I sense something goes on with me a girl and myself in the gym. Bit of banter back and forth. She asked for my insta. How to Intepret this?

should I play it cool and playful as I do now, or should I go on and ask her out on an informal night out, since we didn't have time to have a proper convo?

Ps: gave her the chance to leave together since we walk the same direction but she wanted to stretch. Not sure if a woman being attracted to me would lose a chance to have 15 mins to talk to stretch.

I sense something goes on with me a girl and myself in the gym. Bit of banter back and forth. She asked for my insta. How to Intepret this?
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