You can see which casinos offer WinCard programs at their website: http://www.wincards.com/GamingLinks.html

Basically, you pick up a WinCard purchase slip at the slot card booth, fill it out, take it to the cashier cage, and purchase a WinCard packet for $10. Inside will be 15 $1-WinCard chips, plus the game guides for playing blackjack, craps & roulette. The WinCard chips are No Cash Value chips, so you must play them on the tables; you can't just cash them in for a quick $5 profit. What I do is keep one for my collection, save a few extra as traders, then play the rest on the tables. As you play the WinCard chips, if you win, they take your WinCard chips but pay your winnings in real chips. (If you lose, you lose.) I typically save 5 in the best shape, then play the other 10 and try to convert them into $10 (or more) in real chips, then cash in. You may not always get your full $10 back out of each deal, but I've never lost the whole amount either. The reason you must sign-up is that they limit the sales of the packets to 1 per person (per week?) so that locals or repeat players can't just do this over & over. The packets are designed to educate new players on how table games are played.