Change is happening in the furniture business, and Jerry Sommers, one of the owners of Norridge-based Furniture City, which is celebrating its 57th anniversary, has been in a prime place to see it. The business has been at 4300 N. Harlem Ave. since 1972, matching families with sofas, dinettes and lounge chairs. Q. What was the space used for before? A. It was like a butcher shop and it was an art store, and then we just took over it. Q.