Just saw Sam Sifton's Diner's Journal entry on the Neptune Room, 511 Amsterdam (84th St) 212-296-4100 in today's Times.
Food seems okay, but not great. Since I am looking for a place in the UWS for a quiet dinner, this sounds reasonable. But the tile and terra cotta, even if balanced by a wooden ceiling, sounds like it might be hard and nosiy.
Here is the link: