Bands typically play waltzes far too fast. For a general audience about 100 to 105 beats per minute would be better. If you have music you must play faster announce a quick waltz, but keep it short because it's exhaustive to dance. Dancers in the audience might volunteer to lead-off a particular old time waltz. St Bernard's, or the Destiny are fairly easy.
More people probably know the swing waltz, but they often dance it badly.
These sequence waltz s are organised in eight bar segments. With old time waltz s the dancer often takes only one step while you play one bar. That s why the music is so fast but the dance can be quite slow. On nights when the floor is too small for the crowd you should announce more dances. It's also been traditional for many bands to play a single old time set during an evening.