Hi Lauren, and a warm welcome to planDisney. There's no place like Walt Disney World to create magical memories with friends.
Pools are only available to be used by the overnight Guests of that Disney Resort hotel. So, unfortunately, pool hopping to your friend's Resort (or vice versa) will not be permitted.
If spending the day poolside is a must, did you know that Disney Water Parks are included as part of the
Magic Ticket, available to UK residents? Not only can you relax poolside at either
Disney's Typhoon Lagoon or
Blizzard Beach Water Park (at the moment, one is open at a time), but you can also frolic in the waves, splash down some rides, float on a lazy river and enjoy a meal together. It's the perfect place to while away a day in the sun at Walt Disney World.
If you need more fun ideas for hanging with your friends outside the Parks, planDisney recently created a podcast highlighting alternative
entertainment available beyond the Parks. It is worth a watch!
I'm sorry if this isn't quite the information you were seeking. Hopefully, you find it best to be correctly informed so there's no disappointment on the day.
Wishing you a magical stay at Walt Disney World, Lauren!
Louise