× Expand Courtesy Sheila Robertson Monkey Business Institute members with Sheila Robertson, bottom right. Monkey Business Institute, MBI to fans and friends alike, is another underground comedy offering. This year Monkey Business has been nominated, for the umpteenth time, for Madison Magazine’s Best Of Madison “Best Comedy Group” award for 2026. And now, Monkey Business has a new owner and leader: Sheila Robertson. Expand Courtesy Sheila Robertson Sheila Robertson Sheila Robertson is a veteran improvisor who also has a background in business.