This is not a joke. Repeat, this is not a joke. Durian steamboat exists — yes, you read that right — at Charcoal Thai, where a simmering pot of chicken stock comes with entire chunks of durian swimming around the broth. Start by tearing off the durian flesh and mixing it into the soup (but don't do it all at once or you'll end up with a super stinky stew), before you add your regular steamboat ingredients like noodles, meats, seafood and veggies.
Let 'em sit for a bit to really absorb the essence of the durian (after all, that's what you're here for), then dig in.