National speaker Days to Wake Up, Be Mindful, and Live Intentionally. 7:30 p.m., Barnes and Noble-Carrollwood, free.

Athens, Ga. foursome Perpetual Groove brings their heavy, electronica-infused jams and saturated light show to State Theatre. 8 p.m., St. Petersburg, $20.

Gavin Hawk performs John Walch's one-man play, Circumference of a Squirrel, about a young man with many obsessions, among them, his father, his mother, his ex-wife, the virology of rabies and squirrels. 8 p.m., the Studio@620, $20 general/$10 students and seniors.

Every college kid's favorite piano-playing, dirty songwriting comedian, John Valby (aka "Dr. Dirty") makes his single-night stop in Tampa. 8:30 p.m., Side Splitters Comedy Club, $20-$27.

Nuclear Regulatory Commission staff hold a public meeting in Crystal River today to discuss environmental issues that the agency should think about when reviewing a Combined License (COL) application for two new reactors proposed for the Levy County site near Crystal River. The community is invited to attend and offer input. 1-4 and 6-9 p.m., Florida National Guard Armory, 8551 W. Venable St., Crystal River.