There are some good midi files of "Amazed" out there.
Songs that you may know that that age group may like include:
Margaritaville - Jimmy Buffet
Brown-eyed Girl - Van Morrison
Driftaway - Dobie Grey (Uncle Kracker}
I Will Always Love you - Whitney Houston
Electric Slide
Strokin'
Harlem Shuffle
If you do those, you'll make them dance.

It's too bad, but many people around 30 want to dance to music that is quite vulgar, such as Kid Rock's "Cowboy", some songs by a group called Tone Loc (one of them is Wild Thing, but not the Wild Thing we know!), and others of similar genre. I think it's the beat they like.
There are, however some beautiful songs of that era, including Michael Bolton's version of "When A Man Loves A Woman", Berlin's "Every Breath I Take", and several by Whitney Houston, Alanis Morrisette, Celine Dion, etc. If you can play a little Pearl Jam, you will impress them greatly!
Good luck!
DonM