For the purpose of leisurely laptop use, there's often no need for a big sturdy surface, and something like the Mox Storch Desk will suit you and your machine just fine.
Designer Nando Schmidlin of Switzerland came up with this compact carrel which fundamentally features a bend metal tray and two wooden dowel legs. The lightweight piece of furniture can be effortlessly propped against the wall when it's needed and stowed away when it isn't, making it ideal for small spaces that are subject to adaptation. All you need to do is pull up a chair. The surface is large enough to accommodate a portable computer, though the Mox Storch Desk offers troughs for pencils and pens, making it a great spot for letter-writing and drawing too.