My first job - manager explained "I don't understand discrimination against women - they look so pretty around the workplace" (totally serious) He was a nightmare in many ways but that was a highlight.
School - excellent reputation, all-girl school. Attitude of "of course you can do anything you want, sexism is over. WE're the first girls' school in Wisden! But you don't really want to get your hands dirty in CDT/program a computer/do double maths with all the Chinese, do you?" Only realised that in retrospect, though.
I've usually worked in male-dominated fields, and apart from double-takes when men have realised I'm there for (reason) and know what I'm talking about, never had a problem - in fact sometimes it's been an advantage as in a 99.9% male field, the average potential customer is a lot more likely to come talk to me! I've had more work problems with women who expect me to act 'girly' and ostracise me when I can't. Did have one male boss who said "JOb's yours if you want it. I should warn you though we talk about football one heck of a lot, though." Many friends were shocked and thought he was being sexist - but as became clear, they were lovely all-male colleagues, but really did talk about football loads even by bloke standards...
So most sexism I've encountered has been friends and family going on about how I 'shouldn't really' expect MrNC to do his own laundry - despite him doing it for 10 years before I moved in and he won't let me anyway, how 'it's very good of him to cook dinner' when he does it, and the low expectations women I've met in mummy circles have of their menfolk, which is just insulting to men I think. If I make ds aged 19 months pick up his mess, what would it say if I didn't expect MrNC to do the same??
And the medical profession etc now I'm a parent. MrNC has been asked why I haven't taken ds to the doctor... because he was doing it! Also MrNC works 4 days a week, originally to do building work on his off day. His company are fine with this - lots of staff do flexistuff. But he looked for a new job and a headhunting firm bet they could get him a good job in the City. Few weeks later they apologised and said "Can't believe how stupid all these companies are - lots of them drooled over your CV, you're fantastic, then I said you had to do 4 days a week and I couldn't even get one of them to interview you! THey're idiots!" Men working hours to fit round kids is catching on in the civil service but doesn't seem to have got to the City yet.