Friday winding down and you want the good version of it? Meet the Run and Roast crowd at seven on the Donauinsel, U1 side by Pier 22, for an easy six-and-a-bit kilometers at a 6:30 pace that beginners can hold. Nobody gets dropped, the sunset does the heavy lifting. Free, RSVP on Luma. Bring swimming gear if you fancy the water after.