Hello Strohkopf, I try.
Firstly is not that bad, Is a good start, what you can improve is:
1.The general quality of the materials, everything is too consistent.
The parquet floor is flat and smooth, looks like a fake cheap vinyl floor.
The black ceiling perforated panel as well, too consistent, use some kind of big size noise in the bump plus some reflection maybe?.
Never use white colour with high value,usually I don't go over 160/170 on the Gray scale.
Try to use slightly different tone for the white, in fact you will never find a perfect neutral white anywhere.
2. I recognise that the big lights in the parquet area are probably too strong, what are the value in Lumens?
3. Try to use where possible the IES profile in order to get ore realism and the exact light behaviour.
4.Always use different Temperature for the lights.
The light coming from outside should be blueish and not that orange, unless you have a very strong sun bouncing.
5. try to build a more believable ceiling lamp, you will never have a white circle like that.
6. The glass in the frame in the back looks missing.
7. Try to position the stools in a random way, and the pills on the big staircase as well.
8. Avoid sharp edges like in the gear over the bar.
9. Try to contrast a little bit the image by tone mapping.
10. Revise the camera position for the general composition, in this case the bar is fighting with the other half of the image, try to create a order of importance.
That's it!
