Seems the music trick is actually known, since "Staying Alive" (and many disco songs) are really close to 100 BPM. You can find your favored song through here - http://djbpmstudio.com/bpm-music-index.html - where they sort out songs by tempo for mash-ups. Just go to the 100 BPM range and find one between about 97 and 103 BPM that you know you can get the tempo right for, and Bob's your uncle.
Cure's "Why Can't I Be You?" and 10,000 Maniacs' "What's the Matter Here?" are probably the two I'll keep in mind.