Don't jail them. Fine them. Many of these people are well to do, and a potential source of local revenue. Fleece them. Eighty bucks, plus cost of court should dampen things.
Write up the ones with ID's. Then load them on a bus and ship them out to Maryland, to a distant commuter train station. They should be able to sing "Kumbaya" several times through on the way out. They'll have to buy a ticket back to wherever they parked their car.
Eighty bucks?! What a sweetheart you are! How about eighty thousand bucks? Toss the book at them, bring in their priors, fine and sentence them (both) on second, third, and subsequent offenses. You'll get into the thousands of dollars in fines and a year or two in the slam pretty quickly.
Let's see how keen they are on "prison outreach" after spending six months or a year as Tiny's bitch.