Last night at one of the bars this table next to ours was full of women. As we were eating at ours, the girl at the table next to us makes a joke about someone that walks in and looks at me laughing. I look back and say, ha that's a pretty good one. I didn't really try anything after that and I continued eating my dinner. I ended up leaving that night without even getting her number or anything.

My question is how do you know when to approach and when to not? Like whenever I'm at the library studying I tell myself to focus on school not women. But in the back of my mind I can't help but think I'm missing opportunities.