Hustle a thing in the 70's, or was that just in movies & t.v.? I wasn't born until the 80's, so I couldn't say first hand. In the Los Angeles & surrounding areas, ballroom is 90% 50+. This excludes the young competitors who don't mingle. Those competitors take coaching by independent instructors at banquet halls that rent floor time by the hour. Community colleges sometimes have younger people in classes. The big chains like Arthur Murray & Fred Astaire don't have young students, less than 5 enrolled at any 1 time. The big 2 comprise of the older crowd for everything, privates, groups & socials. It's about the same for the independent places. I've been to lots & lots of independent studios, rent by hour venues, recreational centers & the big 2. Wouldn't it have to be the young competitors & collegiates of today filling the group classes & social dances at full time ballroom studios 30, 50 or more years in the future? Outside of that, young people today & from the past 25 or so years simply aren't interested in partner dancing. I've been in it for about 10 years & none of my friends or associates seem to think it's cool & this will reflect in the future. Even after today's youth become empty nesters, ballroom won't be something on their list of things they've always wanted to do, but didn't have time for. It wasn't something relevant to their generation. It wasn't part of general culture like it was before. That is, unless they're fanatics themselves, but they're the exception, not the rule & they tell me the same thing. I'm sure ballroom will always be around, It just seems inevitable that the studio count will shrink substantially, as well as pro/am competitions.