I meant to type a response to this when I was bored on a flight last week and only got part way there. I've been using Priority Pass for years and honestly probably couldn't remember all of the ones I've been to if I tried, and even then, over time lounges get better/worse. Here is a partial list from the last couple of years, some that have stayed on my memory for better or worse. A few airports have been omitted because I remember going to a lounge there but couldn't tell you much more than that (SIN, HKG, LED, and more)
North America (in no real order)
Calgary YYC: the new lounge in the Transborder concourse is awesome, probably one of the better in NA, with self serve booze, hot food, and lots of seating. The domestic lounge is pretty pitiful with nothing but cold "food" and chips/snacks.
Winnipeg YWG: only option is the Plaza Premium lounge. it isn't bad, was a bit overpopulated with AC crew members the one time I was there, but halfway decent hot food on offer. Manned bar.
Denver DEN: Timberline, I've been to 3 times now. The food is usually somewhere between forgettable and halfway decent, never great. I've found the service to be decent but I always sit at the bar. Harder to be forgotten about.
Miami MIA: Corona beach house, it's a shame they no longer allow you to use PP for the grab and go area, it was my only use for it usually taking a salad for the plane. I'd usually hit that up on my way from the Centurion Lounge to my flight.
Seattle SEA: The Club A gates, decent bar but virtually no food beyond light snacks. Also far from most gates.
Atlanta ATL: The Club, ugh. Overcrowded by all the people who can't get into the SkyClub. Breakfast spread was really weak.
Pittsburgh PIT: The Club, eh. Was there at breakfast, food selection was a bit lower than a Hampton Inn. Friendly service though and a full bar available that is hidden from view due to bizzaro PA liquor laws.
Houston IAH: You can see my
thoughts on that here , I wish PP would add a restaurant at HOU which could use it far more than IAH where they added 2.
Mexico City MEX: I actually like the Aeromexico Salon Premier in T2 over the Centurion lounge with it's self serve food and drink, as well as a bar you can sit at.
Australia (all restaurants)
The Graze BNE: great breakfast, the $36 credit covers whatever you could want
Mach2 SYD: very good, located landside and had nice lite bites/salads
Bar Roma SYD: quality spot for burgers and heartier meals
Europe
No1 Lounge LHR: been here a couple of times over the years, usually in the morning. I like the open bar and the breakfast spread is OK. It's too bad you're limited to one choice from the heavier food menu and the portion sizes are kinda lacking, like you'll can get 1 bacon roll which is a roll with a couple slices of bacon on it.
Plaza Premium arrivals LHR: a nice place to grab a bite to eat and a drink if you're not in a rush to get to your hotel. Last time I was there I had a decent chicken curry dish. Tasted not unlike what I'd heat from the freezer, but still beats the heck out of a cold sandwich or kibble like many lounges
AF/KLM lounge FRA: Located far and away from the LH gates I was using, there isn't really any hot food besides hot dogs. On the plus side there was nobody else in the lounge so it was very tranquil.
Aspire
#41 (and
#26 ) AMS: busy as all heck during the morning leading up the the USA departures. Lite bites mostly. Self pour booze with a Heineken tap. There are two lounges at AMS and they're pretty much the same, just Schengen vs. non.
Skycourt Lounge BUD: Not a bad little lounge, can get busy in the mornings, and has a pretty limited continental breakfast but a decent self serve bar including mini bottles of sparking wine ^
Africa/ME
Marhaba Lounge DXB: this might be one of the best PP lounges I've ever been to. Great manned bar, huge hot food buffet selection, loads of comfortable seating. Busy but handled it well.
Pearl Lounge KWI: probably one of my more memorable PP visits. I didn't realize it was BYO-towel for the showers so had to dry off using paper towels. Fun times.
Good food, and I never knew how great an ice cold Mountain Dew could taste (dry country
)
Shongololo JNB: nice homey lounge. had a make your own sandwich/panini station which I thought was curious. Also interesting cast of characters in this lounge.
South America
LIM: had been to a couple of lounges there, but neither one seems to be part of PP anymore