A dash of spit and grit has gotten Denver’s tenacious Bug Theatre through more than twenty years at its home at 3654 Navajo Street, which started out in 1912 as a neighborhood nickelodeon. For the past two decades, offbeat performing-arts showcases like Freak Train, the Emerging Filmmakers Project, Equinox Theatre Company and the Grawlix have filled the Bug’s calendar with a steady feed of variety, theater and comedy shows. But all that activity creates wear and tear, and the venue can always use a few more structural and interior improvements, like the new surround-sound system and film screen. The Bug’s Best will raise funds while providing plenty of fun on Saturday, September 16, with performances by returning Grawlix superstars Adam Cayton-Holland and Andrew Orvedahl, among others; Freak Train’s GerRee Hinshaw will serve as master of ceremonies. The party starts at 6 p.m. with drinks and food, followed by the show at 7:30. Tickets are $25 in advance at bugtheatre.info or $30 at the door.