Hello! Group bookings display a "Seats left: 8/8" counter on the booking page. There's no way to turn it off.
For a new class, showing "8/8 seats left" broadcasts that nobody has signed up yet, which discourages the first few bookings. Social proof works in both directions and an empty class looks empty.
Request: a toggle in the booking type settings to show or hide the seats remaining counter, while still enforcing the capacity limit behind the scenes.