Interior design usually takes a back seat to fashion. But not in early May, when NYCxDesign (otherwise known as New York Design Week) takes over the five boroughs with hundreds of exhibitions, trade shows and parties. Among the most curated is Collective Design, which features 31 galleries specializing in modern and innovative collectible design. A V.I.P. preview on May 3 drew a stylish gathering of designers, buyers and creative types.