Its really really dark. I can remember your other house was dark as well. Test out colors besides dark gray. There are some good ones
Honestly, I prefer this color. Here's why.
Modern buildings tends to use a same color, could either be dark or lighted. This cafe is almost like a midnight bar style. You know what I'm talking about, this darker restruants that fits the darker category.
Just imagine having a cafe with bright colors at midnight. Seems a bit unusual or a bit "Too bright" right?
That's why I tried to add done colored paintings to brighten the restruant up. But I do thank you for your suggestions to improving my build, but I'm just a darker person in life lol.