Too many No-chella options to catch the New York dance-punk trio’s April gig at Cosmo? You’re in luck: They’re coming around again. Singer Karen O declared that show her band’s best-ever in Vegas. Here’s hoping both the YYYs and crowd overcome Monday Concert Syndrome to best the spring predecessor. With Sam Spiegel DJ set. August 19, 9 p.m., $34, Cosmopolitan’s Boulevard Pool.