A girl smiled at me and I smiled back. Later in a group setting she looked directly at me and big smiles and laughs when something funny/exciting/whatever was happening. Very clear she is into me, however, we haven't spoken much at all, so she's mainly attracted to my appearance/confidence etc. I don't think I can really game her in the group setting as the other members of the group will try to cockblock me. Is the best way to go about it to isolate her at some point for a quick conversation where I get her number or discretely give her my number in the group setting? Unfortunately it will not be possible to do an "insta-date" or get her to do something on the spot due the nature of the situation. My own house is also not a great place or even an option really to meet. We are both in our 20s. Could I do something like exchange contacts and ask to hang out with her at her place for a drink later?