It is so hard to find good modern music that is dance-able. I don't know. Maybe I am missing something. But anyways, I've compiled this short list of great music you can dance to. That is comfortable to my ears, but not so overplayed its annoying.
Great Viennese Waltz
Keep Holding On
http://www.youtube.com/watch?v=yerAdMWKtjI
Iris by Goo Goo Dolls
http://www.youtube.com/watch?v=5u30d6GKkk8
You and Me Life house
http://www.youtube.com/watch?v=VE1FILogdUE
Great Waltz
I think this is in 6/8 but it should work
Strawberry Wine
http://www.youtube.com/watch?v=Up06CryWQpE
You don't even know who I am (Country) Patty Loveless
http://www.youtube.com/watch?v=7VVFRMSwuq0
When I said I do (Country)- clint black
http://www.youtube.com/watch?v=XoZC0Lkji2A
Open Arms - Journey
http://www.ilike.com/artist/Journey/track/Open+Arms
Little twangy but works: Did I shave my legs for this
http://www.youtube.com/watch?v=5vu6ssJWYGQ
Great Hustle
Cry For you - September
http://www.youtube.com/watch?v=pxu6iQ28arw
She Wolf -Shakira
http://www.youtube.com/watch?v=booKP974B0k
Here in Your arms - HelloGoodBye
http://www.youtube.com/watch?v=6-KQ1tp_qOQ
Sexy Chick David Guetta + Akon
http://www.youtube.com/watch?v=N9hazmsUxrM
Evacuate The dancefloor Cascada
http://www.youtube.com/watch?v=A68j28KQaik
Point of No return - DJ Encore (I think it’s a bit fast)
http://www.youtube.com/watch?v=kyOON2eo5f8
Bachata
Just get some of these guys songs.
http://en.wikipedia.org/wiki/Aventura
If you want some good simple moves watch this couple.
http://www.youtube.com/watch?v=EjG4mngQkQs
