Halloween Group Costumes
First, consider how many people you have in your organization. You could have just the right number for a collection of famous people! Like Snow White and the seven dwarves, the Flintstones, the cast of Gilligan's Island, or even all 12 Angry Men. There are plenty of famous small groups to choose from as well; the Three Stooges, Goldilocks and the three bears, or the Three Amigos.
If you aren't sure how many people you can get involved, don't despair. Choose an assembly of people that has flexible numbers. Arriving at a party with a whole gang of gangsters would be great! But if no one can make bail, you'll still be looking fine, solo. Some other great group Halloween ideas include: a herd of cows, Zombies, French maids.
Remember not everyone has to dress exactly the same to make a good Halloween outfit idea. If all your zombies are different, it will look more realistic, and it will friends with disparate disposable incomes keep on good terms. Some people's ideas rely on the odd costume out. For example a sports team plus one referee, the roman senate plus one pin-cushioned Caesar, Hugh Hefner plus as many bunnies as possible.
Getting a bunch of people to agree on one costume theme can be very difficult. If it turns out to be a Herculean organizational feat, try scaling back to a couples ensemble. Dress your dog as superman, and you can be Lois Lane. Your boyfriend is dying to be a gorilla Fine, you'll look great as Faye Raye.