We'll be in New York (visiting from DC) in a few weeks and would like to meet up with a group of friends for a post-dinner drink around 11 pm on a Saturday. Ideally we don't want to pay a cover or for an overpriced table with bottle service. Just somewhere laid back, nice (ideally not a dive), and not packed to the gills with people where a decent-sized group of us (15-20?) can gather. A wine bar or lounge would be great.
Our friends primarily live in Union Square, Chelsea, and Gramercy, but we can certainly pick somewhere outside of those areas.