Sandown used to have the wonderful Aviator Restaurant of course, with those great burgers, until it burnt down. The restaurant was a magnet for pilots flying in. The Specialist Flying School web site refers to their bar and bistro with inside and outside seating so that'll be certainly worth a go. Let's hope you can pay the landing fee there without having to cross the runway (I'm assuming the school's on the Northern side).
I really hope the airfield continues and thrives in whatever form that takes. I shall make the effort to go back!