Answer
Large oceanfront properties sometimes reserve spa desks for registered guests—call before you cross town for a day-pass facial. Standalone studios on Coastal Highway usually welcome walk-in traffic. Parking rules differ for resort lots versus strip-mall spas.
Sources: Visit Ocean City · Town of Ocean City
Editorial visitor guidance for Ocean City, Maryland. Confirm current Town of Ocean City, Maryland DNR, NPS Assateague, and NWS rules when regulations or safety apply.
