What is the best physical activity to sell to your girlfriend if you want her to be mid or low level fit and not get hit on by too many guys? She got a physical job 2 months ago and her looks are way better now, she went from a 6 to 8. However summer is near and I don't wanna downgrade HAHAHA wtf should I do, her normal job is sitting for 8 hours. Also she hates all/any kind of sports except swimming I think...

I am looking for something that she can do alone or with only women.