I think that's true, but only to an extent. I've seen some very popular 1920s-themed nights with old style music to 'dance' to - but I'm not sure how many people get into it from that. I think the clincher a lot of the time is simply good music, if it's an old song but is just perfect to dance to then keep it in the playlist. The problem is when the music is from the 60s, and should stay in the 60s. The Latin are dances are sort of more 'fun' and I always think that you really have to be in the mood for ballroom to fully appreciate it.