(A bit IITK specific, but it should make sense to the general audience, if any)

You know you are in Hall 7 when you survive to eat and not the other way round.
Note: Hearsay. Despite many unsublte hints, I am yet to taste the envy of IITK.

You know you are in Hall 4 when your canteen bill exceeds your mess bill.

You know you are in GH when
- People eat, sleep, dance, sing, walk and do every other activity imaginable on the basketball court except play basketball.
- Your fruitwala bill exceeds your mess bill and canteen bill put together.
- There are as many people in the T.V room watching the daily saas-bahu drama as there are watching an Indo-Pak nail-biter.

You know it is 12 a.m. when guys come pouring out of every nook and corner of GH, much like mice had poured out on the piper's tune centuries ago.