My daughter and I did this on our last trip. We ate at the tambu lounge, Nomad Lounge, Hollywood Brown Derby Lounge and Crews Cup Lounge. They all had limited menus but most of them (maybe all?) said we could order from the restaurant menu, too. The food was so much better than when we’ve eaten at the one credit restaurants on the dining plan. It ended up costing us less to eat than the dining plan, too. We only made two reservations the whole 9 days - one for Oga’s and one for our final day’s brunch. Best overall dining experience we’ve had in our 10+ Disneyworld trips.
ETA: Our only night at Disney Springs we walked into Jock Lindsay’s with no reservation. The Edison had a slight wait, but we told them we were just there for drinks so they let us go sit at the bar right away. The first thing the bartender told us was that he could get us anything from the full menu right at the bar.