Group bookings need a deposit. A provisional Saturday afternoon held for twelve people who never confirm costs more than any no-show, because it blocked the only slot everybody wanted.
Waivers are the bottleneck on arrival. Signed digitally before the day, they turn a queue of twelve people filling in forms into a group that is briefed and racing on schedule.
Each kart is an asset with hours on it. Engine time, servicing and which chassis has been off the track for a fortnight determine how many can actually run on a busy afternoon.
Midweek is the real problem. Knowing which evenings are habitually half empty is what makes a league night or an offer worth running, instead of discounting weekends that would have sold anyway.