heres some fishhead type examples

1) trump plaza. sign up for card, get 20 points, and get $25 free slot play and $25 free food. then come back anytime after 72 hrs and they give you another $25 slot play and $25 food.
if you play video poker/blackjack machine for .25 to get the tier points theres no way youll be down more than $10 getting the free $100. i lost $50 doing it for me and mrs milwaukee, but i was playing $2-5 bj/poker.
2) resorts has a deal where they reimburse slot losses up to $100 in 2 $50 chunks. so play a $50 or $100 slot and hope to get lucky. quit at $100 loss and youre even.
3) ballys lets you play 1/2 hr slots and they reimburse losses up to $100 + give you 2 free hotel nights and 2 buffets.