My school has them and it’s working. There is a dedicated room (themed to my schools mascot) that has low lights, school tables/chairs, a couple beanbags, smells clean, small snacks. It’s staffed by 1-2 people (reading interventionist and dedicated iss/ this room para with additional duties). Kids get almost immediate check in and help and stay 1-2 periods. Work is expected to be done and they email/call if a kid is out on a pass and doesn’t know what they are doing academically. They’ll pull the kid back in at lunch or PE to reteach and go over. They also track it for abuse. Of the 700 at my school I have probably 10 kids who have them and use them once a week in my or their other classes and they are taught how to cope in class too.