Actually, I’m kind of thinking that might be the reason for not serving droids in the first place.
Barkeep: Hey, kid, get those droids out of here.
Whiney-- I mean, Luke: But whyyyyyyyyyyyy?
Barkeep: Look, if I let those droids in, then I gotta let all droids in, and after what that sonofabitch Bender did last time – no way, ho zay!
Seriously, even though I greatly doubt whether Lucas really knew what he was going to do with the backstory and its droid armies, that rationale actually fits quite nicely into the overall story.
If I recall correctly (and there’s a good chance I don’t), Wuher (the barkeep) was afraid of droids taking over his job. This fear grew into an outright prejudice against droids.
At least, that’s what I think was in the “Tales of the Cantina” book, which may or may not be canon according to who you ask (I’d heard that the “Tales of” books were all canon according to Lucas, whereas most of the regular novels weren’t).
Dirx (who is overly fond of parentheses)
In the novelization of Episode 4, the barkeeper says that they don’t serve anything that a droid would use. Which is basically what Larry Mudd and HPL, among others, have suggested. It’s a bar, not a machine shop.
Also, in the various novels there is a fairly wide-spread prejudice against droids. Especially the more humanoid droids, like C-3PO. It isn’t really so far-fetched. A lot of people were creeped out by ASIMO, that little robot guy that Honda built.
I never thought of that, but it’s true that allowing droids into a place like the Cantina would be like allowing someone to bring a camera into a brothel. The people who go there do not want publicity.
I hadn’t thought of that. Notice that, while they clearly have the technology, there are no droids that could pass for human, or that look even remotely organic. I also wonder how typical C-3PO’s behavior is for other humanoid robots: prissy, efeminate, submissive, and physically awkward. About as non-threatening as imaginable. Can’t really think of any other civilian humanoid droids from the movie. There’s the silver one that looks like C-3PO who says something rude to him in an alien language at the beginning of Star Wars, and the rest are all military droids (the droids on the Death Star, the assassin droid turned bounty hunder IG-88, the Trade Federation’s droid army) which would, of course, have an entirely different design philosophy.
Well, though I’m not a starwars-head at all, I will mention the 2 obvious clues that he did have some of the backstory worked out from the time ‘a new hope’ was being written:
the fact that he called it ‘episode 4’ in the first place.
the references to obi-wan kenobi ‘fighting in the clone wars’