22 years ago upon coming to US with in particular several thousands in cash of new smelling $100s i was trying to pay $2 bus fare by pulling one of those fresh $100s from a small stack and trying to give it to the bus driver - the bus driver was actively refusing it - "no change", etc. - and i was perplexed to say the least and thought that the driver uses the "no change" excuse for some unclear to me reason "I don't understand, I mean this is US, the dollars are used here not something else, this is a good genuine bill, fresh from the bank, look it has sequential numbers with the others in the stack, how is it "no change" when even back in Russia i usually had no issues with change even from a $100 bill" :)
Though even there I remember another interface mismatch situation - a group of Russians in our hotel wanted to rent some very expensive car, and the rent agency required a credit card where is the guys naturally had no cards, only cash in the amount almost sufficient to buy the car :)
In general through the 1990s the behavior of the post-USSR people, Russians in particular, coming to civilized West out of the woodwork of the post-Iron-Curtain chaos was in many situations comic-worthy.
That sounds a lot like Boeing Employees Credit Union and is one of the dozen or so reasons I can't understand why they are so popular around where I live.
I use Seattle Credit Union (formerly Seattle Metropolitan) and not only do they handle cash in branches, they were open the whole pandemic though some branches needed an appointment to make sure someone would be there.
It just amazes me that a credit union can get so popular while effectively outsourcing (for example, when someone like you would go to "a non-cashless credit union") a basic function of banking. I know of a couple of credit unions in the Puget Sound region who have dropped out of the co-op credit union network in response to BECU only doing shared member activities via their ATM. BECU's customers would turn around and come to those other credit unions, increasing their load.
> the average bank branch doesn't keep a bunch of hundreds laying around
Is that what you've found? I think asking for 10 or 20 would usually work. If you wanted $200,000 worth, you might get asked a few questions :)