I just booked for July 3rd. It will be my 11th time over 25 years. I went last year for my birthday with a group of 7, ages from 12-47. 3 of us had been before and 4 had not. Everyone loved it. I am taking my niece and nephew next for their first trip, and they are 6 and 8.
The food is decent, I like the sangria

and the show while it is corny is fun and we all laughed like dopes over the silliest jokes.

They do a lot of audience interaction and then chose some people to be in the last skit of the show. We had cat 1 seats, I think it was table 22, which was 1 table back from the stage and really great seats. We saw the 5pm show then, but I have booked the 9:30 this time due to our schedule, but I did not feel rushed at the 5 show.
It is a lot of fun overall, although getting there was not much fun. Allow plenty of time. We drove in and parked, took the bus to Pioneer Hall and it was a bit of a drive. We got there within 5 mins of start time.
It does get a bit chilly inside with the a/c.
Ps.. the Hoop-de-doo even has a myspace page, with videos and pics..
http://www.myspace.com/hoopdeedoomusicalrevue
Have fun if you do go!