This is an attempt to re-create the "Drew Carey's Improv All-Stars" that was on HBO (I think). They did the blind-fold barefoot mousetrap gag, the Jeopardy gag and the Point-and-Tell-A-Story gag. They even had Sean Masterson and Kathy Kinney in the lineup. This show also was given in Las Vegas, which may explain why the current run is staged there.
Drew appeared in those two shows WITHOUT his glasses because he had just gotten his eyes "lasik-ated", and he even made several jokes about the procedure in his stand-up routine before the show started. (He DID say that after he had the eye-fixing procedure that he had based his comic career on wearing nerd-glasses, and he didn't know how that would wash with the public.)