If I read it correctly, you're actually 45 years old. Definitely cool if you can retire now!
I got out at 57, obviously not as young as you, but still young enough that lots of people over the years have asked me the same question - "should I retire". My answer is always the same - if you love your job, keep working. If you don't, get out. Only you can answer that.
At 57 I was doing rotating shift work 24/7, 365 days a year, so my decision was probably easier.
If you go out young, you need activities to keep you busy, and you need to take care of yourself. If you don't, you will join the legion of people who's legs have given out and now ride electric carts at Walmart.
I would say your acquisition of the roller rink is fortuitous and you could do far worse than this -
View: https://www.youtube.com/watch?v=pK3Yvlv0Mvg
If any of you have ever been to Central Park in NYC, this is the CPDSA - Central Park Dance Skaters Association. First time I saw this there was a lady, maybe 90 years old, just jamming to the music, and she looked like she could kick my butt! I bought skates the next day.
It's a little hard to tell from the video, but they are skating an oval, same as a roller rink. I would assume something similar goes on at the one you bought. Nothing wrong with DJ'ing AND wearing skates!!
A slight edit - if any of you want to try jamming on skates, always, always wear your wrist guards.