This is probably highly variable. None of the gas stations I can think of off the top of my head are near anything particularly nice nor interesting, and often are pretty inaccessible if you discount the road.

Commonly gas stations here on interstate highways are complimented with a number of restaurants, from fast food to sit down.

Seems fairly easy to turn a gas station store into a store and coffee shop.

We have this in Germany in pretty much every gas station: I never sit down for a coffee there if I can avoid it. The atmosphere of looking at gas pumps and lorries while slurping my coffee just doesn't cut it for me.