Spitfire Grill is/was on the south side of SMO. "DC-3" is/was next to the museum on the north side of SMO. DC-3 is, as a Pacific Flyer restaurant review once put it, for the people who ride in the back of the Learjet, not the front. Rather pricey!
Yes, that's In-And-Out just under the short final to LAX 24R at the intersection of Lincoln and Sepulveda. Great place to sit and watch and occasionally experience wake vortices.
Always liked the Mariposa coffee shop at the Hacienda. Used to live and work near there when I was with Hughes Space & Comm, plus go there for an airline collectables show (lots of model kits and aftermarket mod kits and decal sheets) every few months. Now that show tends to bounce between the Hacienda, the Proud Bird, and one of the hotels on Century.