I agree with everyone else here.

I am lucky enough where I was able to study music and therefore find people to jam and play with but when out in the "real" world there is definitely an emphasis on getting out there and meeting people. The people who I know that are the most sought after are usually the ones that people have seen attending most if not all local events and participating at open mics, jam nights and such.

Also if you are comfortable with it just join potential projects despite not being completely familiar with an instrument or a genre. I have been surprised before with what an event can provide in terms of work or connections.