UPDATE (March 8):
This promotion ended early for non-local players. If you have a Nevada ID, though, you can still take advantage of it through the end of March.
At the end of last year, Total Rewards ran a promo at the Rio and Planet Hollywood, where you would receive a free buffet after earning 50 points in a day. 50 Points is $500 coin-in on video poker or $250 coin-in for slots. The promo now covers the Flamingo, Harrah’s, Paris, Planet Hollywood and the Rio and has been extended through March.
After you earn 50 points go to the Total Rewards booth or promotional kiosk at that casino to receive a voucher for a free buffet at any of the participating casinos. It is limited to one redemption per card, per day, but you can use it multiple times through the end of March.