I've never worried about what's hot and what's not; trust me, the last number one song I can name is Mary's Boy Child (Boney M).
I love Abba, I love Star Trek and I love musicals; always have, always will. If it's not hot, so what?
I was laughed at in secondary school (high school), but I was getting far more than any of my classmates were (so who should have been laughing at whom).
I was laughed at in university as well, but I had a great boyfriend so I really didn't care (and fifteen years later we're still together).
Now at work most people are older than me, and they love those really old things; Ginger and Fred, The Andrews Sisters, Humphrey and Lauren. Not really my thing, but as I always say "Whatever floats your boat".
As far as I'm concerned, do what ever you love and enjoy doing, listen to what ever music you like, and watch what ever films you want to watch and don't worry if these kids think it's hot or not.
Just keep it legal .