The Vortex has developed a strong profile on London's improv jazz scene and is now well known for its consistently exciting programming. Mopomoso is the improv club night to catch here. A monthly, it was founded in 1991 by guitarist John Russell and pianist, trumpeter and composer Chris Burn. Its aim was to 'promote improvised music and, where applicable, its relationship to other forms of contemporary music-making, with practitioners coming from backgrounds in jazz, rock, folk, classical, electronic, world and computer-generated music'. Expect instrumentation to range from the traditional to the newly invented, and there are occasional collaborations with artists working in poetry/spoken-word, dance, film and performance art, too.