It is surprising to see the Kigali Pearl Lounge on the AF lounges list thread, but why not, then let's add some photos and descriptions to it.
Note that I was flying on a Kenya Airways (that took off plus landed 30 min early - no joke ) marketed and operated ticket in economy. Eligibility is alike for KLM flights (marketed or not by AF / ST partners ).

Name of the lounge : Kigali Pearl Lounge (contracted / operated by NAS aviation).

Location :
- Transit passengers: turn right immediately after security checks, at the right of the Flemingo Duty Free Shop.
- Departing passengers: Past immigration and security checks. On your left hand side, after the Flemingo Duty Free Shop.

Opening Hours : 24/7.

Entry requirements: Business class, top level frequent flyers (Skyteam Elite Plus in our case), Lounge Key, Diners Club, Priority Pass and walks-in ( all fees below).

Food offer: Self serve hot and cold buffet.

Drinks offer: Self serve non-alcoholic drinks and beers. Free wines, spirits and coffees upon request at the bar.

Services

Wifi: Yes fast.

Showers: No.

Toilets: Yes.

Quiet zone: No.

Loungers/sleep area: No.

Business area: No.

Spa: No.

TV area: Yes, France24 news channel or Premier League.

Passengers are called: Yes.

Information screen: Yes.

Newspapers: Yes ( the daily Rwandan « Newtimes ») plus airlines magazines.



Other informations

Number of seats: 80.

Level of noise: low.

Design: typically Rwandan.

View: No outside views.

Multi floors: No.

Terrace: No.

Smoking area: Not inside, but read here to know how you can smoke airside nearby.

Direct boarding: No.

Plugs/USB chargers: No.

Other: Kids area, and business rooms available. For smoking click here !