At MDRF we have a lot of members of the International Wenches Guild (
link) and the Rogues Guild (
link). I have a Rogues pin, but I don't really think of myself as a member. Just kinda got it on a whim.
I also have a RenMerc's Pin (
link), which I identify with a bit more, and I'll wear the pin from time to time. This one is based around being responsible and honorable, refraining from drunken brawls, and demonstrating that armed rennies can be an asset rather than a danger.
That's about my level of exposure to faire related guilds, households, and clubs.