You should be able to find single deck games at all off-Strip casinos that still pay 3:2 on blackjacks, or even at places like oSheas or Casino Royale on the Strip.
DO NOT
I repeat
DO NOT
play at a single deck game if you walk into a place like the Mirage and see a "Blackjack Pays 6:5" sign on the table. I half heartedly would like to take a smelly crap on the floor of casinos offering such ripoff games. The casino in those games adds 20% to their advantage by paying 6 instead of 7.5 to 5 for blackjacks.
That being said I still stay at many hotels that offer it, but never ever play it.