I admit I don't get out much but the one time I walked into a restaurant that had old fashioned pressurized seltzer bottles on every table was at this amazing non kosher Jewish restaurant in Budapest a decade ago (now sadly closed)
https://www.frommers.com/destinations/budapest/restaurants/kdr-tkezde
as you can see in this article (which also updates that they intend to reopen it)
https://turizmus.com/cikk/vendeglatas/gerendai-karoly-vezetesevel-nyit-ujra-a-legendas-kadar-etkezde