We did this rehitching ceremony during our lunch at the Garden Grill. It was really cute... all the servers and hostesses came to our table to witness it. Some people have said that characters came to their table too, but we weren't that lucky. They do some quick "I do's", and have you kiss to the count of 100 (they count 1-10, and then by 10's up to 100). We got a certificate saying we had been rehitched and in place of the usual dessert, we got a cake.
We thought it was really fun and would suggest it to anybody who doesn't mind being the center of attention for a couple of minutes (they announce it to the whole restaurant).
The funniest part of it for us was when they asked what those two little words we had said on our wedding day were, my DH sais "help me?" That got a good laugh out of everybody.
I'm not sure if they do this during the ice cream social, but it would be worth a call to find out.
Enjoy!