Swim Labs
Muddy Branch Rd, Gaithersburg, Maryland
100% positive
Directions: When you walk through the front door, walk straight until you’re almost at the end of the hall, and there are two gender neutral restrooms to your left.
Comments: I swim there but the people there are really nice so I don’t think they’ll hassle you over the restroom if you’re not a customer and you don’t need a code or anything.