For multi-family properties, who typically manages the laundry part?

I currently own a couple laundromats and I'm looking to explore the idea of managing on property laundromats as well. Is this typically via networking at the leasing office, with the actual owners, or through the property management companies?

keep in mind, these would need to be multifamily that actually has laundry on site, so likely at least 50 to 100 units.