Kayaker, here. Different set of muscles, but still works the core a treat.

I get the same "I'm moving myself" joy out of kayaking that I do out of biking. Putter around the same, too.

Bike to a coffee shop, kayak to a bar. Some of the bars and restaurants on the water in Seattle have docks, so boaters can park and come on in! Getting into kayaks from a high-ish dock after a couple beers is very entertaining for the folks watching through the windows. (we got some applause when we succeeded.)