Other ways to make friends include,

Stand on the street, wait for the bus, wait for the bus standing on the street, forget your headphones, forget your headphones on a day when you have to stand on the street waiting for the bus, look in both directions, one way for criminals the other way for the bright headlights of your ride home, look back the other way, criminals, look back the other way and get disappointed by a dump truck, which has nearly the same yellow and blinding illumination as a city bus, coming to take you away. Consult the schedule pointedly, and reference your time-piece, for the benefit of the potential criminal to your right, acting out the specific behavior of bus waiting, so that it is no longer indistinguishable from hooking, seeing as you are standing on the corner, with nothing - nothing at all to insulate you from predatorial conversationalists. Then a girl comes, and she has lipstick and bright eyes and you have wine mouth and no headphones, so you are free discuss the unknown quantity of the arrival of the bus, hedging your bets and calculating probabilities.
"Get home safe," she calls out, and it is a secret society of humans who don't wish each other dead or compromised.