60 would be the max or so, from what I have heard.
Remember...1st seating runs from 5 or 5:30 till 8 and then second seating starts at 9, so.....you constantly have people coming and going as they stagger the arrivals.
Also....FYI...while the "domed" center of the room with the flowers is beautiful, we've dined in that section twice and dislike it. We always ask to sit on the outer rim.
REASON? Guess what that dome does? It does something funky with the acoustics, and depending on your seat you can hear some of the conversations of the people on the other side of the dome. Very weird.