Vegas has an excellent bus system and, thus, I rarely rent a car if I'm sticking to the Strip, Downtown and malls (Canon S90).

RTC Bus Stop (EOS 7D & EF-S 15-85 3.5-5.6 IS USM)

Gateway to Las Vegas Premium Factory Outlet

Bus Stop Floor Detail (EOS 7D & EF-S 15-85 3.5-5.6 IS USM)