The "golden Age" of the gringo bar followed the retirement migration of older gringos, mostly from the USA <note I said USA - not "Americans">
(I don't want to use the term "Americans" b/c then I piss off my friend Bang Bang, for not making clear I'm referring to people from the USA when I say Americans, vs confusing folks that I really mean Peruvians or Argentines - even though to whom I'm referring when I say "Americans" is aparant as dog shit on a dinner plate..........

)
Anyway, that out of the way and clarified

, Gringo bars serve(ed) a defined cliental (for the literal, no, not exclusively)and frankly that cliental has decreased in recent years - sure, 20 - 25 years ago - when guys like the late Irish Drifter, and my friend Bang Bang settled in Costa Rica, there was more of a need than today, with fewer retiring here (its not the cheap place it once was......)
I mention BB and ID - but what is interesting is the one thing the retiring N. Americans had in common was they tended to be heavy drinkers (
NOT the case with BB, and I don't think the case with ID - so there are exceptions to every rule) and since they did not do much to integrate themselves into life in Costa Rica, they wanted places like the neighborhood bar they left in say, Cleveland.
Depending on your perspective - I drink very little, so it has no effect on me - some will mourn their passing, but what kept them in business was a steady stream of - lets be kind - heavy drinkers, with little to occupy their time other than going to a bar - and with fewer retiring to CR and fewer to San Jose - I think the trend will continue.