nostr:nprofile1qqsxvns8pl39uakaema9fy5uphjzajkssyqfx5r7yn0yvgs828xm02spzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcm6e8rm is an app that does so. Meetups are listed on the site without membership last I checked.
Discussion
Also see if Vexl is active in your area, as it's an app for coordinating in person p2p bitcoin use.
Just downloaded Club Orange mate. Believe you need to sign up to see locations etc but that I can do.
Looks like for listings that's true. I know I'd found public pages for events set up in Club Orange but that was using external searches.
Basically they host events and can manage rsvp's with anyone but discovery within the app by location is subscription based.