Musicians don’t need a drum to play percussion. Some just use their bodies. It’s called body percussion or body drumming, and it’s a specialty of Crosspulse, a nonprofit that, according to its website, is “dedicated to the creation, performance, and recording of rhythm-based, intercultural music and dance.” It’s a style of music some of the organization’s musicians will demonstrate and perform at the Sebastopol Community Cultural Center in Sebastopol. Both the workshop and concert will be on May 13; the former at 2 p.m. and the latter at 4 p.m. Tickets are $25 for just the workshop or the concert, or $40 for both, and may be purchased at seb.org/event/crosspulse.