O.K.
#1 Taking a picture of the building on the shade side is iffy at best. Go there at a different time of day, and maybe the light will be better. Have to agree with you on this point.....The time of day was off. We've been there in the morning and it looks much better.
#2 Probably the most potential in this group, but try for some different camera positions/angles. Try to identify a place where the composition is compelling. I'm working on the whole composition thing.
#3 Your flash is reflected on the opposite wall, and it looks like your white balance is off. On-camera flash might work in some cases, but the biggest issue is the composition. Yes the flash.....infernal thing. There were quite a few people in this small room, so taking another shot waould have been tricky. As far as the while balance goes.....The subway tile was a cream/off while color. I'll have to figure out how to change the white balance.
#4 Has possibilities, but the composition just isn't quite there. Try just one row of lights, or try at a different time of day, or try some detail shots, or something. Good point.
#5 Now you're starting to see outside the box,but again, the composition isn't much. Something to strive for.