Let them know that you are coming!
Yes
It depends on the time of day. They have a lounge area downstairs by the fireplace where you can order beer and snacks, but it also doubles as a waiting area for people trying to get a table, so if it's a busy night the lounge may be full. On nights when the upstairs isn't reserved for a private event it's great for a group wanting to get a drink, though i don't believe they serve food up there.
Definitely
Depends how busy they are...it's a great spot for both beer & food, but I'd call ahead for 20. They do have tables they can pull together.
Yes, and there upstairs area is really great too.
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