When it comes to Norway, this is simple as only one airport in the whole country have lounges: OSL. There is:
1 SAS Domestic lounge
2 SAS International lounges (1 for C pax, 1 for *G card holders)
1 lounge used by BA, AF, QR, SU, CZ, AY, KL and FI.
That is, I believe, the exhaustive list of lounges in Norway.