Cambert is missing the point. There is a difference between an adjective derived from a noun and an adjectival noun. "Artistic" is the adjective from "art" or "artist", but that doesn't stop the word "artists" being used as if it were an adjective, and the result is different. Artists' Community = A community, which belongs to some artists. Artists Community = A community for artists. Artistic Community = A community which has the character of artists. As with: Printer's Manual = A manual belonging to someone who works as a printer. Printer Manual = A manual for a printer. Printed Manual = What you seldom get with software these days. In each case we have (i) noun, genitive case; (ii) noun, used adjectivally; (iii) adjective. The meaning is different each time. BTW - Nice place, Bucharest. Ever go to that beer hall thingy with the wonderful ceiling?