We have traveled with 8 the past two years. We have been to:
Le Cellier
Teppan Edo
The Wave
'Ohana
Crystal Palace
Chef Mickey's
T-Rex
Mama Melrose's
and even Sci-Fi (in adjoining cars)
and weren't split up, even over busy Thanksgiving Break. Not saying it can't happen of course, we have been lucky.
Teppan Edo's tables are meant for large parties, so are Biergarten's if you are trying to make sure that your group is together.