When working in a group with two men and one other woman I make a point which the two men then say is dumb. A few moments later one of them makes basically the same point and the other one agrees with him. The other female points this out saying 'hey she just said that but you interupted her and said it was stupid' which they both then deny. The rest of the meeting is spent with them continually not letting either of the females finish their points. It's like they don't believe that women might have something intelligent to say.