With an ACLO Card you can participate in group lessons and open hours at the ACLO. You can find the group lessons and open hours in the schedule or on kaniknusporten.nl and you can join these hours unlimitedly*. The difference between group lessons and open hours is that during the group lessons, the lesson is being given by a sports teacher. During the open hour, the sports teacher only acts as supervisor (like during the open hours climbing, futsal, and swimming).
* At the ACLO Sportcentrum you do not need to make a reservation for the grouplessons and open hours. For the group lessons and open hours at ACLO Station and the WAS Swimming Pool you have to make a reservation via MyACLO.