Jenn's comment below about how cold it was in Branzino's front room made me think of "seasonal" restaurants.
For example, my wife and I shy away from Lauletta's Grille in the summer because the open kitchen really saps away any effect from the air conditioning. Similarly, we don't go to La Lupe in the summer (but we do order delivery) because they don't have ANY air conditioning.
Conversely, we were at Fitzwater Cafe for breakfast last week and sat by the door. It was a bit chilly when people entered and exited, so we may reconsider going there when it gets very cold.
Does anyone else know of any other places like this???