Sonic Drive In was the only fast food place I could find online meaning “Sonics” is wrong. I dislike the “put ball on either side” style, rather than only suffix or prefix. The double letters one feels a bit lazy to just have red herrings in too. Decent first attempt otherwise.

Fair critiques for the most part

Puzzle edited

Should "restaurant" have deserved credit?

I mean, they are technically fast food restaurants. I didn't want to penalize someone for using restaurant, since it would seem like they know the connection well enough.

Great puzzle!