DIM SUM, DAD JOKES, AND DOWNTOWN DELIRIUM It's ridiculous, but Richard Chang's solo show serves up wordplay, warmth, and a wonderfully wild cultural mashup. ✦ ✦ ✦ ✦ ✦ ✦ ✦ ✦ ✦ ✦ "It's called a Yamaha," Richard Chang jokes while pointing to his yarmulke. This and many other puns and plays on words… The post Off-Broadway Review: AI YAH GOY VEY! " ADVENTURES OF A DIM SU…