Is there anywhere in Las Vegas that you can play single deck blackjack? And if so, do any of those games offer 3-2 on a blackjack?
According to Current Blackjack News, only Silverton and El Cortez deal single-deck blackjack in Las Vegas. Everywhere else, it's double-deck and six- and/or eight-deck shoes.
El Cortez has six single-deck tables and Silverton has two, and yes, the games at both casinos pay 3-2 on naturals.