yes, wendy's was the 'super bar' at some point and they had some hot pasta items as well as cold pasta salads.
gino's had a salad bar. i remember it well since it was my responsibility when i worked there :)
roy rogers did as well - and i think at least one of them (in maryland) still does. i didn't take all that good a look because i was in a bit of a rush - there did seem to be more there than condiments though.
i think it was gino's that started it - not sure though. i don't remember any mc d's or burger kings having the salad bars, just gino's and then the roys added them. (no wendy's in the area really except for the one in glenolden and that one didn't open until '81 or '82 and i don't think i ever was inside, just used the drive through).
I don't know if Roy Roger's ever had or now has a salad bar, but the fixins bar has lettuce, tomato, onions, pickles, sometimes red onions as well, pepper rings, some sort of pico di gallo and one or two other items, as well as all the sauces. They often have a big canister of Old Bay, and a bottle of the hot sauce with the wooden cap (Chalulu or something like that). The fixins bar does resemble a salad bar.