I've never been here with a large group, or when it was busy at all, but the space seems like it would be amazing packed with people playing pool, hanging around the hammered-copper bar in the corner, milling about all the rooms. Initially, I thought the atmosphere a little off - like a river casino targeting 20-somethings - but it's actually quite clean, cozy, and genuine. I haven't put my finger on it yet, but something about the decor is not quite right. Maybe it's just a little tired.
The hosts are friendly, service quite good (though I've had the same waitress all four times I've been there, so I can't vouch for the whole staff), and the food is surprisingly good. I say surprising, because this place feels less like a restaurant than a venue, despite the sea of white tablecloths and neat placesettings. I wasn't expecting much, but after having tried several dishes (an amazingly delicate mushroom gnocchi stands out) and received very good wine recommendations, I have to send virtual compliments to the chef.
Obviously the Academy is fantastic for large groups, but a quiet lunch with your date by one of the big windows with a view of the tower is a really good option.