Looks like you have a nicely organized space that works well. Your post asked what other people do so here goes. The end goal I have in mind is for my boys to become responsible capable people by enjoying learning, playing, creativity and work. I think to get there they need to perceive all those things as being fun and part of the same game. I don't want the boys to feel that "work" and "learning" are the opposites of "play" and "creativity". I try to avoid things like awarding play time for having put in work time as that reinforces the perception that work and play are polar opposites. Yeah I have to kind of trick them into working sometimes and most of the time they're on to me. But I try.
If I'm not going to make clear distinctions between "work" and "play" I also need to avoid creating distinct formal areas for those activities. I have no designated space that resembles a formal school classroom and no official playroom either.
Having said that, as you pointed out there are different types of learning, playing, creating and working that might need to go on. Some is messy or boisterous, some requires quiet solitude and concentration, and others needs a relaxed collaborative space. The loud or messy stuff goes into the "project room" or outside. Quiet activities might happen anywhere there is peace (usually a bedroom or the den), and the relaxed collaborative activities often end up in the kitchen. All our pencils, markers, crayons, paints and papers are kept in the "project room" but in little fishing tackle boxes that are easy for the boys to carry around. This way the supplies can make their way to the kitchen or wherever they want and, with some prodding and reminders, will end up back in the project room when finished.
I've tried a similar system for making Nerf gun foam darts get collected and put away but so far haven't found the answer. Those things seem to breed like roaches and show up in the strangest places. But at least those aren't as painful to step on as Lego bricks!