August 21-23. It seems like only last month—not six years ago—that we covered the collective, grassroots effort to launch the Hudson Valley’s only community radio station, WGXC (90.7-FM in Greene and Columbia counties and online). Since then, the volunteer-run effort has added to its endlessly varied schedule with broadcasts centering on regional and international news, youth programs, talk, ethnic interests, selected syndicated content, and a dizzyingly diverse music spectrum (full disclosure/plug: your music editor hosts a WGXC show, “The PA System,” 7-9:30pm on first Wednesdays), all of it supported mainly by listener donations and fund-raising events. Among the latter operating-costs generators is this weekend-long happening at Riedelbauer’s Resort boasting live music by the Roving Cowboys, Herbcraft, MV & EE, Pigeons, P.G. Six, and Rhyton, interstitial sounds by DJ Lunar Moss, and more. See website for schedule. $15, $25. Round Top. (518) 622-2598; Wgxc.org.