Our county is now at level 3, so my gym is limited to 50 patrons per hour. The busiest times are probably more like 200-300. You have to book on the app exactly 48 hours in advance. I am going tonight at 9p. Could not get a time tomorrow. Managed to book 7p for Wednesday. Took stalking the app and repeatedly clicking to get that time. It was booked out in two minutes. Frustrating, but what can you do?