Here's information, as supplied by the Louisiana State Police-Riverboat Gaming Section, showing the average electronic machine payback percentages for each area's casinos for the 12-month period from July, 2007 through June, 2008:

These numbers reflect the percentage of money returned on each denomination of machine and encompass all electronic machines including video poker and video keno. The best returns for each category are highlighted in bold print and you can see that the Baton Rouge area casinos offered the best returns in most categories.There is no public information available regarding the payback precentages of gaming machines in Louisiana indian casinos. 

NOTE: If you happen to win a jackpot of $1,200 or more in Louisiana, the casino will withhold 6% of your winnings for the Louisiana Department of Revenue. If you want to try and get that money refunded, you will be required to file a state income tax return and, depending on the details of your return, you may get some of the money returned to you. The $1,200 threshold would also apply to any cash prizes won in casino drawings or tournaments.

All casinos offer: blackjack, craps, roulette, slots and video poker.  Optional games include: Spanish 21 (S21), baccarat (B), mini-baccarat (MB), poker (P), Caribbean stud poker (CSP), pai gow poker (PGP), let it ride (LIR), casino war (CW), three-card poker (TCP), four card (FCP), big 6 wheel (B6), keno (K) and bingo (BG). The minimum gambling age is 21 for casino gaming and 18 for pari-mutuel betting.