If you go inside, the sink will be piled high with tea cups and coffee mugs while the table will be laden with a wide array of biscuits, mostly chocolate.
See the look of panic in the eyes of a teacher when they have to teach but haven't had time to imbibe some industrial strength brew.
It's somewhat ironic then, when a survey of members of one of the largest teaching unions in the United Kingdom found that around one in 10 teachers thought that caffeine laced energy drinks were the main cause of poor behaviour in the classroom (from the pupils not themselves).
This belief is backed up by academic research; a study carried out by the Yale School of Public Health in 2015, found that children who drank these cans packed full of caffeine and sugar were 66 per cent more likely to be at risk of hyperactivity or show symptoms of inattention.
The survey, which followed the drinking and behavioural activities of 1600 12-year-olds in Connecticut, USA, concluded that children shouldn't drink energy drinks at all.
Despite the warnings, more and more European teenagers and younger children are buying Monster, Red Bull or Rock Star, with just under seven out of 10 adolescents consuming them.
In the UK, some teenagers are drinking as much as seven litres a month.
As consumption of soft drinks continues to rise amongst Australian adolescents, it's fair to assume they are also drinking more energy drinks.
A survey of the drinking habits of 399 Australians aged between 12 and 18 found that more than a third had drank more than two cans within a day and more than a half experienced some form of negative impact from drinking the brews.
To put it in perspective, Health Canada, the government body responsible for the health of that country, recommends a child between the ages of 10 to 12 take no more than 85mg of caffeine a day; a 500ml can of Red Bull contains almost double that figure: 160mg.
And this might not be their only source of caffeine, which is also found in chocolate, hot chocolate and Coca Cola.
The obvious solution would be to simply ban the sale of these drinks to children as advocated by TV chef and food campaigner Jamie Oliver, however many governments don't want to challenge the massive power of the food and drinks industry even though a ban in Lithuania for under-18s four years ago has seen an improvement in behaviour in the country's schools.
The head of nutrition at Lithuania’s Ministry of Health Almantas Kranauskas has reported that children became more patient and less anxious in schools following the ban.
If governments are reluctant to take on the drinks industry, schools could instigate their own bans on energy drinks, but even this might be difficult.
When a Jamie Oliver inspired campaign to introduce healthy lunches to schools in the north of England was launched, a group of mums began passing their children burgers, chips and fried food through the playground railings because the school had banned pupils from going to local fast food outlets.
Realistically, determined pupils and parents could circumvent an energy drinks ban far more easily.
Teachers would have to be given the authority to undertake the time consuming task of searching school bags for contraband drinks, which could easily be smuggled in containers of water bottles.
And any ban could simply make the product more attractive to teenagers, like other forbidden substances such as alcohol, tobacco or cannabis, which is already linked to the consumption of energy drinks.
One study found that groups of teenagers were caught in a vicious cycle of dependency; taking energy drinks to cover up their use of cannabis, then needing to smoke more dope to control the hyper activity caused by the drink.
Not only that, a collaborative project between educational psychology students at the University of Southampton and Oasis Academy Lord’s Hill found "the advertising of energy drinks promote a culture of non-conformity to rules, risk-taking and aggression."
Just the kind of product designed to appeal to rebels not wanting to follow rules.
Part of the problem for non-rebellious children is their degree of ignorance around these drinks.
Another report found that many of the children who were consuming them had no idea of the strength of caffeine in their drink, believing it to be similar to Coca Cola, when in fact one energy drink can have four to five times the amount of caffeine.
Other pupils understandably believe an energy drink is a healthy choice confusing the bright packaging, energetic names such as Relentless and sporting connections with taking an actual sports drink.
A logical response to this ignorance would be for schools to educate their pupils on the contents of these drinks, pointing out the health risks and how they can effect behaviour.
While stimulants in staffrooms are not causing delinquent behaviour it is worth considering why caffeine has become so central to all of our ways of life.
Children and teenagers are drawn to energy drinks for the same reason adults are drawn to coffee and biscuits; they are simply too tired to function.
A large part of the world's population is suffering from sleep deprivation.
The same project from Southampton University looked at the negative connection between sleep and these drinks.
The more the children in this survey of 12 and 13-year-olds drank, the more difficulty they had getting to sleep, which meant they needed to take another energy drink the next day to stay awake in class.
It seems to me that while it is right to be concerned about the gallons of energy drink being consumed by our students, it is only a symptom; the root cause of the problem is that children and adults alike are not getting enough sleep.
If we could find a way of encouraging better sleep, we might have fewer students hyped up on energy drinks and fewer teachers wired on coffee.