There's got to be a better way to find out about the lounges than through this method. I'm sure there is an industry database somewhere. Alternatively, you could call the airport authority in each country or region and they would be happy to brag about their airports and the lounges.
I must have visited hundreds of lounges around the world over the last few years and I couldn't begin to try to recall them all now. For me and for other flyers, the best thing to do (if we are particularly concerned) is to go to the airline website and check before each flight.