Women and Girls, Men and Boys

Not sure how i do it because i don't have a system for when i call someone a girl or a woman or a boy or a man, it is something that just happens but apparently it can be a minefield to some people who deem it patronising but a YouGov poll found that most Britons see it as acceptable language, whether to describe a male or female.
A majority of Britons (58%) think it is always or usually acceptable for men to refer to women as 'girls' with the biggest  difference between generations with 70% of people aged 60 and over think it is unacceptable language and 48% among those aged under 24.
Referring to men as 'boys' is fine with 70% of Britons who think it is generally OK to refer to men as boys but something i had seen creep in, and doesn't bother me in the slightest, is a group of women being referred to as 'guys'.
I don't bat an eyelid when the waitress or someone asks 'Do you guys want another drink?' or 'Are you guys all okay?' but apparently some people, women especially, don't seem to like it with 38% not finding it acceptable to be referred to as 'guys'.
Again, seems to be an age thing with  72% of under 29 year olds think it is acceptable to refer to a group of women as 'guys' but this figure falls to just 46% among those aged over 60.
I don't really do the guy's thing, not aware it is a phrase i have ever used, but I do refer to men and boys and women and girls and i don't know what causes me to make the definition between them but as most of us think its okay, i don't have to worry about it thankfully.