I want to create a note card that lists clickable LMs (EASY to do) to the 14 music hangouts (nearly all are open stage/decks, 6 to 8 have regular weekly events) in my community region.

But how do you add to a notecard clickable LINKS TO GROUPS we have 6 groups which i would like to list too.

Ah, I didn't understand what you meant.  The best you can do is include a full perm object that contains a group joiner script and the UUIDs of each of the six groups.  Then a person just has to rez the object and click it to get the joiner menu.

Or do as Lindal suggested, which is much easier.  ;)