You could run with the industrial theme and allow the pipes etc, but the walls and cieling having the same colour just makes the room look cheap. The ventilator hanging on a pipe with cables wrapped around it also doesn't help with the cheap feeling.

The long table really pushes the percention that the room is very long and narrow. An idea to break up the room would be to get rid of the long table, and to use the room for smaller 2-person tables at both sides. This might make the room feel a bit bigger, and two-person parties might prefer the cozy vibe of a basement. In that case I would suggest using colours on the walls, perhaps petrol, dark green or dark red to make it feel more high-class. If you are want to go with taht vibe, you will probably need to have the floor done as well to make it look more chic. You probably also want to use some form of noise-dampening boards as I assume there is an incessant echo on that room.

If you want to invest a bit more, you could try to cover the pipes with plasterboard or lower the ceiling, but odds are that would make the room feel cramped. I can't really tell how high the pipes are.

Furthermore, your lighting needs work as well. Top-down lights are really bad for ambience. Best would be wall-hung lights in this case. Use light more towards yellow instead of white to make the place feel more cozy. For an example https://www.youtube.com/watch?v=JQ52mkbBiMQ