It's usually very simple. If you play table games (i.e. blackjack, craps, etc...) and you buy in 500 or a 1000 at a time, play for at least $25 to $50 a bet, and play for several hours a day. You can be sure that the casino personal will introduce themselves to you and get your name. Then they will track you every time you play. Some places you need to give them a card, others just your name.

Believe me, if you play enough, they will take care of you. The more you bet and the more time you play for will determine the level of comps you receive.

I not sure how it works on machine games (i.e. Video poker, slots, etc...) but, I would guess your not going to get much playing the nickel machines.

I haven't paid for a hotel room in Vegas for 15 years. If you really want to know for any specific hotel. Just ask one of the floorpersons in the pit.