You looked on Instagram and other for pictures taken at the bar, and you found one either taken by the woman in question or one of her friends with the mystery

You looked on Instagram and other for pictures taken at the bar, and you found one either taken by the woman in question or one of her friends with the mystery woman tagged. Or maybe you knew that she wanted him to meet her at an event and you found a roster for that event- or ie if it was a real estate convention you would have a pretty good idea that she was a realtor and could look at websites for realtors in Austin. Or maybe you checked his recent facebook friends, looked at his recent twitter followers, and everyone who liked/commented on his recent photos/posts on Instagram and whatever other social networks he's on- as well as the photos/posts he liked/commented on. I think you took a (relatively) low-tech approach to this.