I used my 3rd bedroom for crafting and the occasional guest. Now I am converting our sunroom into office space for me and I have a craft table in there. As soon as I can I am installing French doors in the opening with frosted glass. That way I can close it off and my mess doesn't show and there will still be light filtering in.
. I also will have a banquette built w/ a small table that can be used for lots of projects. I like to have a place to set up jigsaw puzzles and leave them out. Good luck with your project!