Do they have a private room or area I can reserve for a party of 15-20?

Yes

Agreed, I would call and ask. It's quite large, I'm sure they have room, I don't know if they have a separate area or not, though.

I personally do not know if they have a private room. But they have areas that can Mark Off for Private Areas. Call them and request if you can do that with dAte and time. They are quite wonderful about getting you the best of service!!! Say Mike sent you, I've been going there for 20 years or more. The Staff is Wonderful. You might want to go in person and chat them. Kindest Regards, me Michael Patrick Kerasotes September 15th, 2019... Good Evening!!

They may be able to corner off an area but I've never seen an actual room.

They do have a side back room

They have a group table setting, but it's in the main area... Didn't see any side rooms, I'd call.

I think but not sure