Per session (morning / afternoon / evening) we take up to 3 bookings, 16 people in total.
(Since the 2-team setup is limited to 2 bookings per session, the maximum is two 2-team setups — 6 × 2 = 12 — plus one “4 servings (1 team)” booking of 4.)
For a private booking, up to 5 teams is possible — with 4 people per team that’s up to 20 people, though it gets quite cramped.