Look up local bars or clubs that you think might cater to or let jazz musicians play at. Call them up and ask for their regulars' names or band names, or you could go on a night they go perform and ask to sit in with them. Cultivate new connections, be involved. If you're more of a loner, go on an open mic night, jam on your own. Solo jazz piano (especially if you can sing) is great in an ambient, quiet bar setting. It gets people in the right mood, as far as jazz in bars are concerned, and they'll love you for it. Women will feel romanced, dudes will love you for putting their women in that mood, and you'll make some tips. If you don't, well, there's always next time, since the bar owners will see how you make their patrons come back for more, i.e. spending money on booze, etc., so they'll invite you back.
Just get out there and blow em away. I have faith in you, anon.
Trombone fag here. It's hard to do solo stuff on my instrument, so that's why I'm learning piano. It makes people (women) in awe of your prowess and ability to have all eyes on you, which is what you want if you're a musician!