The standard ballroom dance tempos are:
Waltz 90
Quickstep 200
Foxtrot 120
Tango 132
ChaCha 120
Samba 200
Rhumba 108
Jive 176

Thes all came from a ballroom dance teacher of long standing.
For ballroom dancing one of the most made mistakes is playing a waltz too fast.
Country waltzes are played faster.
Slow Balads go about 75 to 90.
If you start with these you won't go wrong.
Of course Rock & Roll, Boogie Woogie, Blue Grass, ETC, are a different matter. Maybe someone else can jump in here.
Good luck,
Walt