Today I heard a radio broadcast from the "International Brotherhood of Electrical Workers Local 71". It wasn't calling for any action, or calling out any employers, so I'm guessing they were trolling for membership from private electrical contractors.
I am a member of a National Association for people in my industry. We have a magazine, and we organize training events and attract deals from manufacturers, etc.
I don't know of any organization that calls itself a guild these days, but I'm wondering what is the difference between tradesmen organizing themselves into a Guild, vs a Union, vs an Association?
I've never been a member of a union, nor a guild, but I am a member of several different associations which operate like clubs for the most part with very minimal membership requirements, small annual dues which usually just barely exceed the cost of the magazine subscription, and a pretty loose organizational structure.