Some airline lounges are amazing. Others are horrid. Like the KLM lounge in Houston that I visited in January. It is small and old. It should be closed.
Use the nice Air France lounge that is less than a minute away. Between the SkyTeam lounge sharing rules and the fact that both KLM and Air France are wholly owned subsidiaries of Air France-KLM it makes no sense why this KLM lounge is still open.
If I only showed you this one photo of the lounge you might think it wasn't that bad:

This little back room is the best thing going for the lounge.
The main seating area is one narrow hallway with bench-like seats all facing each other:


Here is what some of these bench-like seats look like close up:

If you are hungry you better find somewhere else to eat. The snacks were neither healthy nor abundant:


To recap: Avoid the KLM lounge in Houston. Use the Air France lounge. I will post pictures of the AF lounge tomorrow so you can see why (UPDATE: link added).
UPDATE: I'm happy to report I did some more research and found out that it WAS recently closed and has been replaced
with a new lounge that looks much better. What a difference two months can make. I visited in January and they replaced it in March. Still - I'm not sure why
they had to do that when the Air France lounge was right next door.