Instead of settling into your sofa, how about slipping out for some ice skating in the great outdoors? At scenic ice rinks around the world?
The globalgrasshopper writes about 10 of the world's best outdoor ice rinks, (However, the one in Tivoli Gardens, Copenhagen, is no longer open.)
Ice skating is a perfect way for solo travelers to people watch and get some exercise at the same time.
Rinks with magnificent backdrops can be found in front of the town hall in Vienna; beneath the Eiffel Tower in Paris; within sight of the stunning El Capitan and Half Dome in Yosemite National Park in the U.S. and elsewhere.
I'd like to add two others, only because I've personally tested them. Skip the skating at the expensive and packed ice rink at New York City's Rockefeller Center and head straight to the skating rink in Central Park.
You get views of the city but also feel the spaciousness of the park around you.
And then there's the National Gallery of Art's Sculpture Garden ice rink in Washington, D.C. Open already. Skate to the music while gazing at the terrific sculptures, by Roy Lichtenstein and others.