I'm only happy when it rains...
The Gallerist in particular has a lot of interaction, but 2 hours with a 4 player game might be a bit sporty.
edit: Food Chain Magnate as listed above is nothing BUT interaction, but it's a MEAN game, and 2 hours is really pushing it. IME, it's more like 3-4. (it is an absolutely amazing game though)
I think medium heavy and two hours requires a few liberties!