Here Comes The Guide is an amazing site with resources, ideas, blogs... I was just showcased a bit...
"...Mobile Entertainment: Rich Ferguson, master illusionist, is a great example. He strolls around while masterfully engaging people in conversation and then… voilà!, he’s blown everyone’s mind with an illusion that keeps everyone talking throughout the reception. ..."
There are some other wonderful tips. Check it out. http://www.herecomestheguide.com/blog/detail/wedding-reception-ice-breakers/
Rich Ferguson, aka, The Ice Breaker http://www.TheIceBreaker.com