From "The Improvisor's Way"
There is no pressure on you to create ‘shock’ laughs. What a lot of people feel is pushing the boundaries of art and being risqué is often just mentioning cancer, rape, racism, scatology or violence. Trust what’s already happening in the scene and heighten that. More often than not, you’ll find a much more satisfying scene there.
Exercise
MAPPING. As truthfully as you can, act out a scene with a couple breaking up. Now play the same scene again, but make it all about chess instead. See if some of the same phrases will fit (“We just don’t play together like we used to”… “Since when have you been playing chess with Charlie?”… “I think I need some space”).