Can I add (not invite) members to a group?

Is there some database wizardry I can do to add members to a group? I need new members to be added to a WELCOME group so that they will keep up with site developments.

THANKS

The Auto Join Group module that you purchased from me allows this. You can either allow members to select from a list of Groups upon Joining or you can automatically add them to certain groups by configuring those groups in the Admin section of the module.

Hello :) In this question I am referring to people who are already site members and not newly joined. I should have been more clear in my question. I need to add existing members. Any way to modify some database table to do this? Thanks so much for your response.

Please post this as a feature request in the support forum for the Auto Join Group module and I will add that functionality as soon as time allows.