It seems there are no description for the NBO lounges (you actually have access to 2 of them, not one : Pride Lounge & Simba Lounge). The review below is for both the Pride lounge (flagship), and the Simba lounge (they offer roughly the same services, except Simba is slightly smaller). All comments apply to both unless otherwise stated. I unfortunately do not have pictures, but you can perhaps link the wiki to this post.

Name of the lounge : Pride Lounge & Simba lounge

Opening Hours : 24/7
Entry requirements : Usual ST requirement (STE+, J) + they serve Rwandair & Precision Air
Food offer : YES, hot and cold offer. Food offer is larger at Pride Lounge.
Drinks offer : YES, soft drinks & alcoholic beverages (including beer), tea, coffee, hot chocolate

Services
Wifi: YES
Showers: YES in the Pride Lounge
Toilets: YES
Quiet zone: YES in the Pride Lounge
Loungers/sleep area: YES in the Pride Lounge
Business area: YES in the Pride Lounge
Spa: NO
TV area: YES (there is also one in each smoking room)
Passengers are called: NO
Information screen: YES
Newspapers: YES - Selected local and international newspaper (can’t recall if FR/NL was available)

Other information
Number of seats: don’t know precisely, but they advertise 315 guest combined (I’d guess 2/3 for the Pride Lounge, 1/3 for the Simba Lounge)
Level of noise: Low in Simba Lounge, medium in Pride lounge at international rush hour (early morning and late evening)
Design: Modern, large and clear with African touch in Pride Lounge, classic business lounge in Simba
View: YES in both.
Multi floors: NO
Terrace: NO
Smoking area: YES
Direct boarding : NO

Paid access: YES for both, USD 40 Dollars, only if invited by a guest who already have access to the lounge.