inkBoat and Ko Murobushi return to the San Francisco International Arts Festival following their national tour of “The Crazy Cloud Collection,” a collaborative piece. Working together, the artists have invited the ghost of Ikkyu Sojun, a 15th century Japanese Zen monk known for provocative, biting and unorthodox poetry, to share the stage with them. Performances will be held at the Marines’ Memorial Theatre, 609 Sutter St., S.F. at 9 p.m. Tickets range from $20 to $35. Info: (415) 771-6900.