epiphany
There's a cafe that specialises in hot chocolate (and all other chocolate) at the top end of Collins St. I'll see if they have a website. I'm trying to remember their name - they have booths and couches - and they have an area where we can watch them making homemade chocs, too.
They don't have a good website, but I think its Koko Black Chocolate, 52 Collins St Melbourne.