I participated in a workshop where they made groups, and each group had to come up with a really, really awful idea (based on a topic, say restaurant experience

I participated in a workshop where they made groups, and each group had to come up with a really, really awful idea (based on a topic, say restaurant experience), and then a different group had to put a positive spin on it and sell it :) It was very fun trying to sell such awful stuff, and it did exercise creativity, which was the point :) .