One woman holds power over three men in overlapping relationships, and all four of them spin before our eyes on a giant lazy Susan set that makes literal the cycle of love and attraction. Cognoscenti will not be surprised to learn that Round and Round: a sexfarcetragedy (sic) is the work of writer/director Jenny Magnus and the Curious Theatre Branch, Chicago’s eminent permanent avant-gardistes. In fact, Round and Round: a sexfarcetragedy kicks off the 20th-anniversary year for the vigorously independent and iconoclastic Curious Theatre Branch. These folks have been Curious so long, they probably remember what A Happening was. Feb. 7-9 only at the Museum of Contemporary Art; 220 E. Chicago; 312-397-4010; $12-$20