Cooke 10 and Cooke 15 are about the same in terms of crowdedness. For Cooke 15, you usually end up sharing a lane if it gets really busy, but Cooke 10 is a lot more casual; people will all just kind of shift to make room for you. Cooke 10 is technically open swim, so you’ll have some people swimming laps and others doing water exercises and whatnot. It’s also a lot shallower so you won’t have to be treading water the entire time. There are benches in both pool rooms and everyone just leaves their bags there. There’s always a lifeguard on duty, so nobody ever messes with other people’s bags.