Ooh yes - older gliders. If you are lucky your club will have some open cockpit gliders. One of my finest experiences - single seater (Grunau), good high winch launch, straight into a thermal and as I turned I could feel the temperature difference on my face. A very close fitting cockpit so almost no fuselage visible as I looked over the side! Bliss! I've never flown or in an open cockpit powered aircraft but I suspect it wouldn't beat that experience,