Booze, you can get it all there I'm sure. Go to the upscale markets and spend all you want. They have imports from all over.
Cop raids. They do this sometimes. They will roll up to a club and slap a big lock on the door and test everyone inside. The moral of this story is don't be stupid and do drugs in Bangkok. There is plenty of fun to be had getting drunk with girls. You don't want to have your e buzz blown by going to some detention center and wondering how long you are going to be in jail in thailand. -EV
Krhap or khap (sounds like kap usually) is used all the time. it's like a period at the end of a sentance if you are a guy. If you are a girl or katoey, say kha instead. You pretty much never stop using it. I have heard thais talking to each other and instead of 'uh huh' or yea the listener is saying khap, khap... khap.. i think i even heard one guy say khappity khap khap one time!
khrap kun khrap - thank you
sawadi khrap - hello
yindee khrap - nice to meet you
dao rai khrap - how much