Is there a sort of party area for larger groups? My brother has been there with 5-6 people, but can it seat 8-10 anywhere?

There is a separate room on the other side of the door that I assume is the party room, I'm sure you could ask to use that. Otherwise you'd have to use two or more tables across from each other.

Yes, there is a separare room for larger parties

Yes.. but NOT anywhere..

There is that large room noted above that could easily handle 10+