Oklahoma Music Academy Official Site | Facebook OMA Summer Jam is an exciting experience for guitar, bass, drum, voice and keyboard from beginner to advanced students. Modeled after our highly successful Live Performance Workshop classes, OMA Summer Jam is a six week, ensemble, rock band style, experience that will inspire students to take their talent to the next level. Students interact with the OMA faculty and receive weekly class instruction that will culminate into a live gig at Cain's Ballroom, a popular and historic downtown live music venue. This summer experience is one of a kind and not to be missed. The event is free and open to the public.