Went for my 50th in 2018 went 27 people! The only full group meals were Biergarten, Artist Point and Crystal palace - all my choice. Biergarten the night before my 50th once everyone arrived was awesome. Lots of large beers being hoisted. Lots of dancing to the band. We had a bunch of those communal tables all right near each other. People could get up and go to buffet as needed. great choice.
Morning of my birthday, we were all at the Crystal Palace. Breakfast for 27! Bunch of tables together. Tons of fun.
Artist point is, of course, no longer what it used to be. But on my actual 50th for dinner, we had 24 of us. they sectioned off an area and we made due with two big long tables. This was almost like a private party. Nobody else was in this back section but us. It was special and a great night. I'm sure any of the bigger restaurants will work with you. They were wonderful to work with and took excellent care of us.