I think clubs are open based on demand. Clubs around me vary from 2 - 6 days a week. There are only so many people wanting to shoot each week so it makes no sense to be open all day or everyday and have little activity. I don’t think if some were open 24/7 it would increase targets thrown by much at all.
My little one trap volunteer club. Two days a week. Thursday’s from 10 am till last shooter. Saturdays from 11:30 am till last shooter. $4 a round. Open to the public. We get a pretty good crowd on Thursday mornings. We get the guys who work shifts or who are off on Thursday, and our retirees. We have coffee and donuts for them. We call it Geriatric Day. Saturdays we get the families shooting.
My oldest shooter on Thursday is 89.