What is a good fitness social hobby to meet girls?

My social skills are horrible and I haven't talked to a girl ever since graduating high-school, which was over 6 years ago. Been a NEET ever since but I exercise regularly and thought that joining a run club would be a good first step towards a better life.

What muscle do I need to train if I want to impress girls at run clubs?

I try to work out 4-5x a week doing gym, running, yoga and sometimes climbing. I also play the piano as a second hobby, trying to practice an hour every day together with weekly lessons.
However, I have been debating in my mind to give up the piano and do more exercise. I have an okay body but it did not improve my dating life at all, like I am still attracting 0 (zero) girls. Maybe I am not in good enough shape? Should I quit piano and just work out 6-7x a week building an insane physique?
I am in this weird middle state where I am not fit enough to get a fit girlfriend and not good enough at the piano to get a smart girlfriend. What should I do?

Girls who run are all universally cute. However, most of my work is focused on the gym. I go running 2x a week but my times suck. Still, I would like nothing more than a cute cardio bunny girlfriend.
Do I need to up my running game or should I stay true to myself and focus on my gym physique more?