The gym was locked again because I took too long. What now?
The unlock button can be pressed throughout the booked period, even multiple times. Accordingly, the door can be unlocked again.
Where is the gym located?
The fitness room is in house 2, Kastanienweg 4 in the upper basement. To get there, go down a flight of stairs from the elevator on the ground floor and enter the hallway on the left. Follow this corridor until you find the fitness room on the right-hand side.