We've attended quite a few shows at improvMANIA and try to bring our friends and relatives when we get the chance. It's an intimate venue with a decent selection of refreshments and beverages considering the size.
Having attended both sold-out shows and shows with 6 people total, I can honestly say we've always had a great time. The improv is well done, uses audience input often, and builds throughout the show. The stand-up show has also been really good (and you get in free if you get there early for the improv show).
Great place to spend an hour or two and then you're right in downtown Chandler for the evening.