Assorted companion support group things I've been thinking about lately because they would be funny:
-they tried to put all of the Doctors in order from youngest to oldest which started at least five arguments, upset at least three different people, and finally exploded when everyone realized Kate actually knows the correct order
-there is an ongoing debate about whether or not anyone has actually slept with the Doctor
-no one can decide if Mel gets cagey about her time with Glitz because she did bad things or if it's because they were together and she will not give them any hints
-similarly, no one can decide why Ace gets weird when someone brings up other time lords and Gallifrey
-a popular pastime is trying to test whether or not Donna is actually part Gallifreyan now, but they can't get her to do a blood test because she is violently terrified of needles, so they keep coming up with increasingly elaborate ways of testing her abilities
-Ruby keeps armchair diagnosing people and it always ends badly
-Kate has unilaterally banned any and all discussion about the timeline of UNIT's history because the dating controversy got so out of hand
-other banned topics include: "who is the Doctor's favorite", "who had the worst time aboard the TARDIS", "who is the TARDIS's favorite", and "which version of the Doctor is the most annoying"
-They've tried piecing together the Doctor's personal timeline before and have largely given up, seeing as half of them can't even piece their own timelines together. They have all agreed not to ask Fourteen about it because he is extremely unhelpful
-There is a running talley of how many times they've all encountered certain species like the daleks and the cybermen and everyone has come to the conclusion that the amount of times they've had to fight daleks is obscene. Ruby, who never encountered any of those, is hopelessly confused.
-EVERYONE starts shipping Mel and the Rani just to torment her
-There is an ongoing debate about who's timeline is the most fucked
-For her own safety, Jo is not allowed to participate in discussions about the Master
-Belinda goes to one meeting, thinks "these people are insane", and never comes back
-Jack Harkness doesn't come to meetings because the two times he went both ended with him getting hit in the nuts because he wouldn't stop flirting (Tegan got him the first time, Ace the second time). Donna is very upset to learn this.
-Everyone loves getting updates about Fourteen from Donna because she exclusively talks about him like he's some weird crusty old chihuahua she found in a dumpster
-Grace Holloway zoomed in to a meeting one time and was incredibly shocked at how blase everyone was about the fact that she kind of killed the Doctor one time.