Churches and gyms can also spread people over the day. Modern technology like apps can help to allow people to plan a visit.
Hardly anyone is going to do that, and you can't enforce it legally, and no business is going to want to enforce it themselves because they know it will limit patronage.
Gyms for example are almost always fit around peoples work/life schedules, e.g. 9:30am classes is the Yummy Mummy hour after they drop the kids off at school. Lunch time classes are work break, 5:30pm-7:00pm is after work etc. These thing won't magically change much.
Churches are Sunday group affairs, always have been always will be, you won't change that.
Bottom line is life has to return to pretty much "normal", and it has to do so fairly quickly whether people like it or not.
People thinking there will be some radical permanent "new normal" are delusional. People are creatures of habit and they will return.