How about everyone put one yard of their personal "ugly" fabric (usually an impulse buy or gift) into a brown paper bag, tape closed, and put numbers on them as the members arrive at a meeting, and at the end of the same meeting draw numbers to take home and use in a lap quilt. You could set rules such as at least half of the yard must be used, may use only a certain number of additional fabric, all of the yard must be used but half must be used on the front and the rest used on the backing....etc.