actually the easiest thing to do... make a small talk with a girl.. they add you on tweet/facebook/intagram.. which ever.. a few days later.. you hit them with a message expanding off the short convo you had before and the chat continues on from there. tell her that texting would be easier than facebook messaging back and forth.. same with tweeter PMing back and forth.. and now you have her number and you can text all the time.. say that stupid way of doing it but i've had luck with the last 5 girls i've hooked up with doing this... all of them turned out to be 'not my type' so the search continues...