Don't call the cops today to complain about the racket coming from next door. The 30 local bands playing at Larchmere PorchFest have the city's approval to perform. Acts such as Gretchen Pleuss, Sam Hooper Group, and Collin Miller & the Brother Nature are all on this year's bill. Expect to find after-parties at local Larchmore bars and restaurants. It all begins at 1 p.m., and admission is free. Consult the website for a schedule and map of the stages. (Niesel) larchmereporchfest.org.