When Billie Joe Armstrong, Tre Cool and Mike Dirnt aren’t selling out stadiums as Green Day, they’re getting sweaty in intimate clubs as Foxboro Hot Tubs. On Friday night, the rockstars brought their side project to the small Brazos Hall in Austin and played to a few hundred SXSW attendees. This was not a secret Green Day show, and the band avoided playing anything from that repertoire, opting for selections from FHB’s only album, Stop Drop and Roll!!! For a band that made its start in small clubs, this is an excuse for the trio to go back to their roots and play small, rowdy punk shows again. Photographer Chad Sengstock was on the scene for PureVolume and documented the fun (and chaotic) show. Check out his photos below.