By Katherine Roth, The Associated Press It’s not always enough for a couch to be a couch. Sometimes, especially when space is tight, it helps if the couch can double as two armchairs and a coffee table, and even storage shelves, as is the case with one Japanese camping couch popular among city dwellers. The multifunctional Camp Couch is made by the upscale Japanese brand Snow Peak, which recently opened boutiques in Portland, Ore., and in the trendy SoHo section of New York.