Some of the smaller designs might work for concert halls, theatres, and so forth. However the big, fluted / chiseled buildings are too "Jetsons" for me.
Hed, I really go for the first two of the five. #3 I find ugly and a bit bizarre, #4 seems colourful, airy, and upbeat. #5 is kind of a strange light sculpture, rather "special effex" in character, suitable for somewhere perhaps, but not the CBD or West End.