There was a chocolate fountain buffet at the RC Marina del Rey last December. I didn't go but from what I read, it was only a chocolate fountain with dipping items such as fruit on skewers, graham crackers, and pieces of sponge cake. So actually, it wasn't a real chocolate buffet, at least not from the mind set of a glutton like myself.

For a good dessert buffet (not necessarily all containing cocoa), I recommend a good, high-end, hotel brunch.

Like this one:

http://beverlyhills.peninsula.com/pb...derebrunch.pdf