We did DDs at Crystal palace and they did nothing except bring the cake (oh, and they had a few pieces of confetti on the table). She turned four, and I thought they would have one or two characters come over speically, but they didnt. Our waitress aid they weren;t allowed near the cake on account of their fur (fire....). We did get a card signed too. I forgot that.
My son's birthday was celebrated at WCC and they did sing there...they made the enitre restaurant sing, but its pretty rowdy there anyway. Other than that and bringing out the cake, they didn't do anything.