Its good to find people to play guitar with, just as it is good to talk to people. The musical mind likes conversations made up of notes, sentences of phrases, and so on. Finding the appropriate "music friends" to sit down and have conversations using the guitar as voice increases vocabulary and fluancy. A "bar or measure" then becomes a paragraph and a song, a short story. Jazz is very democratic and it seems to me to be similar to small talk, gossip, or good company.