Yes, Vienna is where I heard and saw "Wiener" and "Wr." the most and I know that it's a masculine form of "Viennese". /s means "this has been sarcasm". Whether you find it funny, the intent has been signposted.
Now seriously: Does "Wr." become "Wre." in plural the Nominativ form in the female Genus?
German speakers also say "Berliner" a lot ... especially around Berlin.
Not at all LOL
I'm pretty sure I saw "Wr. Neustadt" written somewhere in Austria but not in Germany.
It's the name of a city district on a signpost, where context is clear anyway. You are way overthinking and overinterpreting it.
Yes, Vienna is where I heard and saw "Wiener" and "Wr." the most and I know that it's a masculine form of "Viennese". /s means "this has been sarcasm". Whether you find it funny, the intent has been signposted.
Now seriously: Does "Wr." become "Wre." in plural the Nominativ form in the female Genus?
No. In this usage, "Wiener" is an adjectival derivation. It does not change with cases or plural.
Thanks. I also just learnt that "Stadt" is already feminine so that shows lack of declination already.