By Caitlin Switzer MONTROSE-When he spoke to the Montrose Mirror last March, Luis Guillermo Cadena of Montrose was successfully running his own restaurant, Shanty 2, at 411 North Townsend Avenue. The 43-year-old entrepreneur had an appreciative and steady clientele, built up over seven years. He liked nothing more than to chat with his customers when he had a moment away …