Vince Herman—singer, guitarist and washboard player for Leftover Salmon—will join some friends for a performance at Cervantes’ The Other Side in Denver on December 19. Colorado band Gipsy Moon will open for them. The show will be a part of the venue’s Grass for that Ass series, which has been a Thursday happening since March.

In addition to the billed performers, there will also be a Weekly Jam segment hosted by local musicians from 9-11pm. The event is slated to end at 2am.

Admission is free before 9pm for anyone over the age of 21. After 9pm the cost will be $10, which is the all-night price for anyone under 21.