Hope this may help.
I sent the following mail to Priority Pass:

Good day.

I'd like to report that I was refused entry to Panama - Tocumen International Lounge: Copa Club.
It was on 15 November around 5 pm.
The reason given was that at this time of the day they accept only first class and business class passengers. No Priority Pass allowed ;-(

Sincerely,
abeyro

PS. Furthermore, you may like to know that other lounge you list at Panama Tocumen airport, namely Airport Club, does not exist any more.


The third lounge at PTY is landside and I didn't try it.
Priority Pass reaction was that I should contact my bank. Mehh :-)

However I managed to visit Copa Club some other time and my report is: hot, cluttered, food options were oranges and chips. No open bar. Warm wine and tapped beer (slightly cooler) were served at a manned bar, that it is, if you fancied cutting your way through the crowd :-)