Can they accommodate a group of 20 people?

I would think so. Even though we were not a part of a big group, they have the accommodations for it.

Yes

Yes. We've done a large group meal, and we've been to an engagement party there that was standing with cocktail high top tables. They have a back open space that can be used for large groups, and even curtained off. Give them a call, you'll have to work out the details with them.

I have seen a wedding party that contained more than 20 people at that facility.

I would think so