Riff Raff

End Transmission After six years, Trance Mission -- the highly acclaimed WAMMIE-winning ambient "fourth world" music quartet -- has reached the conclusion of their joint purpose. With clarinetist Beth Custer concentrating on her new group 80 Mile Beach and didgeridoo master Stephen Kent composing the score for the up and coming stage production of Shopping Cart Soldiers, the musicians have decided to focus on separate artistic ventures. The group concocts one last percussive batch of techno-primal soup at St. John's Church on Saturday, July 25. (S.T.)

It's a Benefit DJ Shindog, founder of "New Wave City," and DJ Damon, founder of "So What" and "Bondage A Go-Go," have finally joined forces for "Ballroom Blitz," a DJ dance night with nothing but the best white-boy club music, regardless of genre. The promoters say they'll spin the gamut: Bowie to Blur, Pistols to Pulp, OMD to NIN. Tonight's party benefits the SOMA Coalition, one of the groups supporting the South of Market clubs under attack from the neighborhood's growing residential population. Ballroom Blitz will be held at Big Heart City on Friday, July 24. Also, "So What" celebrates its five-year anniversary at the Maritime Hall on Saturday, July 25. (S.T.)

Riff Raff riffraff: Robert Arriaga (R.A.), Johnny DiPaola (J.D.P.), Karl D. Esturbense (K.D.E.), Jeff Stark (J.S.), Silke Tudor (S.T.), Heather Wisner (H.W.), and Bill Wyman (