I belong to two pretty large guilds. The bigger of the two actually has several groups that meet at other times, some weekly, some less. The smaller of the two has lots of community projects, bus trips, and retreats. But at both guilds I have felt welcomed, but that may also be me because I am pretty outgoing and am not afraid to be the first to speak.
The main reason I belong is because it gives me the opportunity to take workshops at a very reasonable cost.