Floating through crystal-clear water to refresh your margarita at a swim-up bar is no longer limited to private islands and luxury resorts. The concept of the swim-up pool bar started in — where else?

This swim-up bar is… not that. You can’t lean on it, for one; you’ll capsize the whole thing if you do. It also doesn’t come with bar stools — and it’s not equipped with its own easy-going, ...