Is there a private room..meeting room/area? For small groups??

No, but there are àreas where you can make a private party. You must reserve it before.

private room, meeting room????there is not possible, all space are divided for small groups but finally it's open place.

There are areas which could be set for a private party, but this would require advance notice

Yes, they have baby showers,etc.But I guess it's advance notice.