Get a players card or whatever its called at that casino. When you play table games, hand the dealer your card so you can be rated.. they'll watch your bet per hand and your time at the table, the boss will come over every once in a while to see your bet amount and put it in the computer... when he comes by put down a little more than usual
I played roulette and won at The Venetian , i started with $100, left the table after 4 hours with $700, I started at like $25 a spin and when i was winning was up to $50-100. I get a call every few months from a host at the Venetian asking when I'd like to come enjoy some free nights. I've used 2 free nights from them since then, and didnt even gamble those times. They still call and offer.