What's the thing that you love to do, could totally nerd out on, monologue about — or that hobby you want to start or pick back up?
Decide to start a group or a club or a discussion coffee afternoon, and then staple up signs for it, post about it, invite people
Maybe it'll turn out to be a dud and no one will show or maybe you'll have to persevere for awhile
Maybe even the process of you putting yourself out there will create a magnetism and you'll make some friends in the process