I'm sure I probably am being unreasonable. But whenever someone says they are going out with the girls, my teeth itch! I think it's because I imagine going out with the girls to be either a nice day trip with your 5 year old daughter and her little friends, or rampant women driven wild from being released from the daily grid getting lashed and dancing on tables.
It's crazy I know. But I say 'going out with friends'. I never differentiate the sex of my friends, it seems a bit arbitrary!