The most memorable one was down in Louisville, where there was a gas station/bait shop/bar. The bartender sold me some whole-hog pork sausage at $2/lb. which he kept in a duffel bag in the ice box. Totally on the up-and-up.
Another is a well-known BBQ joint / convenience store out by Kansas City (I forget the name).
Most common, I think, is having a Subway inside the convenience store. I've seen Burger Kings as well.
The secret ingredient is trichinosis!
Recently when I drove around in the USA, I saw Sheetz, Wawa, Royal Farms, Rutter's, and High's. These are substantially larger with lots of amenities compared to the standard gas stations. Nothing compared to Buc-ee's, but still getting up there.
So you drove from Philly to Pittsburgh?
Wawa has always been known for quality. I remember years back when there was a romaine lettuce shortage, they put up deeply apologetic signs about how they're temporarily substituting iceberg lettuce in their sandwiches.
Meanwhile Royal Farms is known for their fried chicken. Although, the one near my college in Baltimore was more known for being a frequent target of robberies :/
On a road trip, I recently ate at a Sheetz in central PA that had Electrify America chargers. Good food selection, similar to Wawa. Not the best overall experience though -- an unhinged lunatic flipped out at me for leaving a single unused napkin on my table (which lacked a napkin dispenser, and the place had no recycling can). I avoided that charging location for my return trip...
There's a huge war brewing that most people don't even know about, but once grocery stores started imitating Costco and offering gas, the convenience stores have been firing back by undercutting grocery stores on staples.
Around here they'll even undercut Walmart on dairy and select produce.
I’ve also started seeing joint ventures where it’s a proper coffee stand or in one case I can think of an A&W root beer.
Gas stations tend to be physically separated from pastimes (what Burger King owner wants diesel fumes in their store?), and someone at least is hedging their bets that won’t always be the case. I don’t know if they’ll see the fruits but their kids absolutely will.