If you want to make a little bit of coin with the in-ground pool you only occasionally make use of, Swimply is your answer. Essentially the Airbnb of swimming pools (no, you don’t sleep in the pool), Swimply lets renters make use of your swimming pool (not your house). Users can rent by the hour via the “first online marketplace for pool sharing” in numerous states, and the brand is rapidly expanding. The price range is large, but some are under $100/hour, which seems reasonable if you and your friends need some hot weather relief and aquatic antics to break up a hot summer day. Renters can check photos and read descriptions to choose the pool that’s right for them, and there’s a service fee incurred with every rental, much like Airbnb. In some cases, barbecue grills, pool toys/furniture, and towels may be included as part of the deal.