Know the time when she goes to the gym first, and be sure to show your face in front of her.
It's not abrupt to say hello when you meet more than two times.
She is going home, so go home with her. You can talk on the way. Don't ask for contact information at this time, just say see you next week.
You can ask her contact information when you meet again. After this process, most girls will not resist. Be careful not to do it.
Thanks for adoption