Boi Na Braza, Brazilian Steakhouse. It's not on the river but it's one hell of an experience if you like different types of meat. A little pricey but it's all you can eat. They give you a card, if it's green they will stop and offer steak, lamb, pork, chicken or whatever. Flip it to red and they'll let you breath, pretty awesome.
I ruined myself for the evening there.
Congrats by the way.