Considering, I know some of The Justice Girls, and The Cape hosts Parties for them every few months, they are pretty active.
Defcon 0 - (D4 lvl 50),DJ Shecky Cape Radio
@Shecky
Twitter: @DJ_Shecky, @siliconshecky, @thecaperadio
When you air your dirty laundry out on a clothesline above the street, everyone is allowed to snicker at the skid marks in your underoos. - Lemur_Lad
Yeah, they're one of the more active SGs around. They have a 20-day inactivity allowance period, which means whoever's there will msot likely have been on in the last few weeks. None of this "inactive for 300 days" thing you see sometimes. They also have a very active coalition... I had a friend in that SG for a while and she was pretty happy with them (until she got bored of the game itself). But yeah, they're active, you should be quite happy there!
-STEELE =)
Allied to all sides so that no matter what, I'll come out on top!
Oh, and Crimson demands you play this arc-> Twisted Knives (MA Arc #397769)
Hey Stefanie! I'm Orchid and Id love to talk to you about joining the Justice Girls. 
we are a very active SG and have many great members. We also have 2 other SGs for any of your other female alts if they need a home. Feel free to send me an ingame tell to @wild-orchid for more info. I won't be on til late tonight so you can send a tell to the boss lady herself @mystic blade. Hmmm and as far as our coalition.... they are a great bunch! Very active and friendly. Looking forward to meeting you! Also... I have a secret toon on triumph if you would like to meet there. 
Hi, my name is Stefanie and I currently reside on Triumph! (blah)
I have been a member of the Dolls SG since April (not that long!) I was promoted to the highest ranking possible, next to a leader, and earned just shy of 1.7mil prestige. However, what with the SG Leader being inactive, as well as most of the rest of the SG, I was demoted yesterday without one word being said to me. When I PM'd the leader and asked her why, she said it was because I wasn't doing anything that deemed leadership. I told her I wasn't exactly sure how I was supposed to be doing that when NO ONE from the SG was active (including her!) I ended up leaving because I had actually been unhappy for a while, anyway.
I'm looking for an active all-girls SG that will accept the fact that I am addicted to this game and am on a LOT...I ENJOY earning prestige (and enjoy it even more when it's actually put to use sometimes,) I like doing TF's and Raids and just regular missions, and I also REALLY enjoy farming (I really like pl'ing lowbie friends--but only because when I farm, I find it a waste of time to be by myself!)
Now, after having said all of that...I'm trying to find out how active Justice Girls is before I make the switch over to Virtue. The toon I would be bringing is my lvl 50 Fire/SD Scrapper whom is my main. I actually made a post on Guardian concerning the Dream Team SG yesterday, and haven't heard anything at all! I found their website on guildportal however, and decided that's not what I'm looking for..
P.S. Not sure it matters, but my good friend from the Dolls said he would put in a good word for me...his global is @Xenon Knight'
Mama Stefie, Candie Kisses, Starrmie, Starrie, StarrShyne, Starrlah, Kyandie
@Kiri-chan is my hubby!