I like having an OOC area to go to because sometimes I am not up to actively RPing or I am preparing for a scene, etc. I don't always engage in conversation in said area, so I'd be fine if it was just a Quiet Room.
However, I feel the concept of 'get rid of all OOC rooms because people need to be RPIng not hanging out!' is dangerous. I have been on games that have taken the 'It's a place to RP, not hang out' too far in that they expected if you were online, you were actively RPing, period. As in Staff would begin paging you and hassling you if you were alone in a room on grid. (I bailed super quick the last time that happened. It was a new 'policy' on said game.)
But, in my jaded opinion, I think if your reason to get rid of OOC Lounges to eliminate the problematic element (like people who give play-by-play of RL or who are being dicks to people), you're not going to do anything but drive them elsewhere. Maybe to Public channel, which is fine, but they may end up doing the same on Sphere channels... which is less so (as those are often used to locate RP).
All in all, those problematic off-putting people are still going to be there and you (as in Staffly 'you') are still going to have to talk to them.