I've learned so much form going to Bitcoin meetups. It's probably the best way I know to level up your Bitcoin game. And it turns out there are a lot of them.
I know there are a number of different places that list various Bitcoin meetups, but I haven't found one that was super exhaustive. I made a spreadsheet with details for all the Bitcoin meetups I could find. I've published a copy of it here. Feel free to add any meetups that are missing.