Those days are history. I used to visit the one at the main office in Raleigh North Carolina during the 90's . It was maned by the same person that did passports
That reminds me that the Chapel Hill post office owes me $20. The guy at the counter kept my $20 cash back, and did it in a particularly smooth way that made me think it was a system for him. Of course, the customer has to first forget about their cash back, which I did, but there are ways to facilitate them forgetting. (I still catch myself nearly forgetting about cash back sometimes, at supermarkets – I guess it's perfectly infrequent enough that it never gets established as a habit to attend to that final bit of business...)
It's a bummer that the USPS catalog forces big panes, though they seem smaller than back in the 80s, when all the panes were 100.