I am looking for fast dance songs for dance class ?

Richard Simons sweating to the oldies has a good bit of exercise songs.

Some songs that are in workout lists are
Dancing Queen by Abba
Tell me something Good by Rufus
You Really Got Me by The Kinks
Gimme' Some Lovin' by Spencer Davis Group
Dance to the Music by Sly & the Family Stone
Na Na Hey Hey Kiss Him Goodbye by Steam
Dancing in the Streets by Martha Raye
Locomotion by Little Eva
Do you want to Dance
Louie Louie
I want Candy
Eye of the Tiger

Beyonce seems popular for workout songs too.