Well, since you're on the forums, yes.
Go to your server's forums and post there. Also don't forget to mention if you are a hero or a villain.
It's not how many times you get knocked down that count. It's how many times you get up.
Many of the SGs will have contact information in their description at the SG Registrar. Like, "contact @so-and-soface for more information".
I have entered Atlas 'Paragon City Hall', inquired the clerk and got a list of SG names.
My char is robotic in nature so I would like to join a robot based SG.
Is there a way to contact anyone belonging to any of these SG's besides asking each person on the street which SG they are a member of?