Of the many nightlife options on the Las Vegas Strip, The Pinky Ring is unique. It’s not a concert venue per se, but once you’re inside, it’s impossible not to gravitate toward the stage, which floats at the edge of a cozy, rotunda-like room. A six-piece band supplies a steady stream of funk and R&B hits from the 1980s and ’90s, and the warm, pulsating sound has the exhilarating effect of a tabernacle choir. Everyone wears the dazed, relieved look of someone who’s stumbled into a party they actually want to be at.