Dogberry's not really the type to hire an escort (there's no sport in it), but he does consider himself a friend to those whose work might not be smiled upon by those with more "traditional" values. If he catches wind of an establishment in trouble, he's likely to check it out to see what it's about. It's entirely likely he'd be the type of sucker to empathize and get involved. And who knows, with the right incentive, he could be persuaded to trade.
No Gods and Precious Few Heroes