high-functioning

I rest my lever today. I've been declining invitations for drinking.

'Alcohol is part and parcel of working culture'
https://www.bbc.com/news/articles/cr7rjmzlznvo

<words>
part and parcel
high-functioning [quote]she works with high-functioning people
functional [quote]I was functional.
function [quote]they’re still functioning pretty well
crutch
de-stress
hold down [Collins] If you hold down a job or a place in a team, you manage to keep it
hit rock bottom [Collins]to be at an extremely low level and be unable go any lower / to be in a hopeless or difficult situation which makes you feel very depressed

These are true.
[quote]people become more senior in an organisation, the more social events they are expected to attend[unquote]
[quote]one in five higher earners drinks alcohol at least five days a week.[unquote]
[quote]There was very much a work hard, play hard culture. You would work with people and then you would go and drink with them as well [quote]
[quote]drinking is often the default position for workplace social events.[unquote]
[quote]34% of employees actively avoid work socials due to alcohol [unquote]

Alcohol is still essential for socialising, especially business relations and local community. It's a social manner, etiquette.
Tasty non-alcoholic drinks are absolutely required as an option.