I got this code in an email a couple days ago that I didn't see until now - give it a shot and let me know if it works
Try this No Deposit Bonus code for a $10 Free Chip at Raging Bull!
No Deposit bonus code: RB10FREE
Valid for play on Slots.
Wagering Requirements: 35xB
Maximum withdrawal: $100
Raging Bull is a reputable RTG casino and accepts players from the USA!