We have a new manager at work. Our team is 20 people (12 women and 8 men).
New manager held a mini informal meeting this morning, all very nice and very chatty. At the end he said something along the lines of 'thanks guys, great meeting' and one of the women in the team said 'excuse me? guys? That's extremely offensive to the majority of the team who are female!' And walked out of the meeting room.
The MD was also in the room and he and new manager left for another meeting shortly after so I've no idea what happened (if anything) after.
Would this offend you? It didn't even really register with me until she piped up. Everyone seemed very bemused by it all.