Padel, here in Spain. It's perfect for this, because you need four people and the club matches you with others at your level. After a few weeks I had a regular Tuesday group, and now we go for a beer after every game. The awkward first month was real for me too, but padel has a built-in excuse to talk: someone always needs a partner.
running club in lisbon, three months now. first month was awkward: everyone already knew each other, lots of portuguese chat i couldn't follow, and i just ran at the back. second month someone asked my name. third month i got invited to the dinner after the saturday long run.
would recommend, but the awkward first month is real. did anyone else join a sport to meet people, and did it work? which sport?