Animal Kingdom--I love Nomad Lounge. Yak &Yeti's bar is really small and frequently, when I am there, it will be dominated by children just sitting there waiting for tables.
Studios--I don't think it was the full menu, but Brown Derby Lounge has a good selection.
MK--I would just go over to The Wave at The Contemporary. There's also good lounges with full menus at The Polynesian and GF, but it's easiest to find a seat at The Wave.
EPCOT--Tutto Gusto Lounge is great. I also love having dinner at Spice Road by myself in the main dining area. The staff there is so friendly and great, I've never felt odd sitting by myself, and it was always a great Illuminations view.
Disney Springs--I think virtually every sit down restaurant has a bar with a full menu, and Jock Lindsay's has a short, but interesting menu.