At the aptly named center of London’s improvisation scene, this series, curated by abstract painter Aurélie Freoua, brings adepts of various arts together in swirling, real-time contact. A clip shows Freoua, facing the crowed in a sheath of white vinyl, dabbing paint on glass as a piano trio jams; while the moving parts are hard to assess, the whole should prove greater than their sum. —E.E.