The women of Autodesk get together each month for a "girl's night out" after-hours at the office. Started in 2008, the informal events usually draw 20 or so people for conversation, Nintendo Wii games, and free food. They also host bigger events, such as a karaoke party that drew about 40 people, and an upcoming Wii dance-off. One of the group's claims to fame is that it hatched the idea for a dancing flash mob at the office holiday party.
NEXT: Four Seasons Hotels