8.30pm Sat 28 Hollybush Gardens, London: Simone Forti performance 2pm Roberts & Tilton, Culver City: Daniel Joseph Martinez preview 6-8pm Sun 29 The Gallery of Everything, London: Bob Parks Happening #2 3pm-5pm Tue 31 Almine Rech Gallery, New York: Words Without Thoughts preview 6-8pm exhibitions opening Berlin Mu