A few A.C. casinos have single zero roulette right on the casino floor in the same pit as the regular tables... but they are usually a $25 minimum bet table (Caesars). I'm always amazed when I see players on the lower limit tables who are playing $25 or more per spin don't play the single zero table where the odds are more favorable.

Maybe it's because on even money bets in A.C., a player gets half his/her bet back on 0/00 if 0/00 comes up, but not on the single 0 table.