There's excellent views from the upstairs balcony...get there early and you can get a table overlooking the stage. (http://iwannagothere.com/things-to-do-in-san-francisco/great-american-music-hall/4569)
This place can be pretty laid back. It's a beautiful music hall with some detailed ornamental decor. There are two levels, and both have bars for your Manhattans.










