The hell they aren’t.. What are you talking about? Ever been to an In n Out? My guess is no, since they have a drive thru and low prices like most fast food places... Five Guys, even though they dont have drive thrus- are indeed fast food, though pricey .. but eveyr Five Guys ive ever been to isnt any slower than the average fast food place, in terms of price.
Seriously, what are you talking about?