Some people belong to guilds that sound very worthwhile. Unfortunately, that wasn't my experience. I attended meetings for eight months and never felt welcomed there. If I sat at a table alone, no one joined me. If I sat at a table where others were already sitting, no one spoke to me. I liked the speakers, the show and tell, the block of the month, and the challenges, but the unfriendliness drove me out. If you go with the right frame of mind (i.e., not expecting to make any friends), you might like it. And maybe you'll get lucky and find a friendly guild. That just wasn't my experience.
There's another guild in my area, and I might like to give them a try; but it's hard to put myself out there again given the negative experience from before.