Kinda depends upon where in the city you were and to some degree what class of folks you were with. Downtown & stadium areas not really prevalent.
If you go back, Primanti's has/had a branch location in Oakland (university area). I expect they don't keep the same quirky hours as the original location. That was run to suit the folks who worked in the strip district produce yards and industries.
For those who've never been there, like many other cities, Pittsburgh has/had sections of the city that were ethnic enclaves. Polish Hill is self explanatory. South side was predominantly Slavic. Germans were in the Arsenal area and so forth. If you look at the names of the churches-or the buildings that used to be churches-the names can give you a clue. St Stanislaus, St. Johans Kirke and so forth. They all contributed to the local dialect.