There’s a cover band I see a few times a month and they’re a lot of fun because they play a diverse list of danceable music. Some of the songs already suggested in this thread are ones they play.
Along the lines of the “one hit wonder” idea, may I recommend an 80s medley? That’s always a lot of fun, and there’s endless possibilities of what you could string together. A little Bon Jovi never hurt anyone, either. I would also suggest throwing in some fun old school rap, like “It’s Tricky” or “Bust a Move.” Always a crowd pleaser. I’ve seen 2 bands in the last week, and both of them played Simon & Garfunkel’s “Cecilia” and I loved it both times. I would highly consider that one.
I’m not sure if you mentioned it, but do you want music people can dance to? Or just music that you like to play and will hold a crowd’s interest?