I like it a lot. That being said, I feel like the floor texture is far too perfect. Especially for a dingy bar in the middle of a bustling spaceport that's filled with crime and shady characters. I realize this is far from done, so I'm sure you're planning to do more. Maybe lots of worn scuff marks, stains (food, grease, and other unmentionables).
Also, something that might help make it feel more like a real bar would be having some sort of little service window to imply that there's food to be had as well. Makes sense for a location with a back room with a bunch of booths. Something kind of like this:
To keep it authentic you could make it some type of frosted glass or something with a bright light on the other side, so that you can't really see what's going on in there, but understand what it's implying.