Oingo Boingo always make me wanna dance. http://www.youtube.com/watch?v=fb6SHnQnhX4 http://www.youtube.com/user/nutstothis#p/c/3B4A6D833C3C67C5/19/LJZUAnCuQuY
The only song I can think of off the top of my head is Ain't no Rest for the Wicked by Cage the Elephant. It's the most laid-back song I can think of, if that's what you're looking for.
/\ LOL, LordVader. I like Breakdown and Manipulation by Group 1 Crew. Check 'em out, one of their songs was recently performed on America's Got Talent (Breakdown) http://www.nbc.com/americas-got-talent/video/week-9-studio-one-young-beast-society/1241214/
Judging a whole artist by one song? And Owl City makes me feel great when I'm down with their other songs, I don't really like fireflies imho.
The original poster wanted music that is feel-good and danceable. Owl City is only feel-good, really.
Wow, so many songs! I have checked through them all (yes, believe it or not) and have found some real gems. Thanks guys.