Edit: Incidentally, the New York Pops is doing a "Song and Dance: The Best of Broadway" show on Friday and recently asked this on their Facebook page... there are a bunch of great comments if you're looking for suggestions. https://www.facebook.com/newyorkpops/posts/10156732198039709
Mambo from West Side Story has always been my favorite, quickly followed by Rich Man's Frug from Sweet Charity. But recently, I'm Alive from Tootsie. The music is head-bopping infectious (it makes me want to frug and pony all over the place) and the choreography is hysterical.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian
I'm very fond of the 2 big dance numbers in "ON YOUR Toes": 'ON YOUR TOES" and 'SLAUGHTER ON TENTH AVENUE". SLAUGHTER is great for going out on walks and/or exercising in your room too.
That’s a hard choice with all the wonderful musicals I have seen in person and through filmed performance. But one easy pick has to be Seize the Day in Newsies.