Superpenguin
Penguins! <3
I bet you do have to wear a specific clothing, but if there is an event for swimming, the host would probably give you one if have yet to get one yourself.
I wonder how that would work in the game. Would the game recognize that you're wearing a specific outfit that allows you to go swimming?
What if you don't have one? Then you'd be forced to not swim until you got one.
Even an elegant Ball gown from Gracie, and then Gracie will yell at you next time you talk to her saying why'd you wear my fabulous designs in the water? Don't you know I have a whole selection of swimwear?
It could be titled "Green Swimwear" "Yellow Swimwear" "Striped Swimwear"
Or it could be like pieces like "Girls polka dot 2 piece" "Boy's striped one piece" something like that.