Raffles young chap!
A "Mess" is what you might find yourself in if you're irresponsible
However, if you are in the Services, the "Mess" (or Wardroom) will be an exclusive club and conviviable place where you can meet people of your own maturity and stature, where you can relax and enjoy all sorts of activities, from reading magazines, to formal events, like dining nights, hosting VIP's - sometimes Royalty; to informal events like Summer and Christmas Balls, BoB and other Cocktail parties.
If you become a fighter jock, you may choose to set fire to the piano or trash the main bar during a Friday Happy Hour.
Normally, you should only do this if your Boss or the Staish is not present.
You should get lot's of applause and the bill, and it might affect your promotion prospects.
On the contrarory, you may be seen as a 'good egg', and aspire to an AFC or Air Rank
Your choice
Good Luck!!