system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why does the bartender in the Mos Eisley cantina tell the droids that they won't be served there?

They can't drink anything (all they could need is power) so they wouldn't even have to be served and almost all droids don't/can't socialize so I don't see a reason why they shouldn't be allowed inside.
gpt
Well while what everybody else said about the Clone Wars is very possible. Another point could be just that, just like you said, they aren't going to buy anything. But they are taking up space, people might have animosity towards them, and if illegal things are happening it's easy for a droid to keep a record of it.