Personally, I like BitShares Gaming.
BitShares Bet/Betting
BitShares Gamble/Gambling
BitShares Jackpot
Bitshares Win
BitShares Chips
BitShares Deuce
BitShares Ace
BitShares Flush
BitShares Guess
BitShares DACasino
Now lastly, my two favorites:
-Bitshares Lucky
-BitShares Vice!
(sounds pretty cool, just hope it doesnt sound too depreciative or that people might associate it with something bad)