The owners , who also run the Umbrella Bar and Lounge and Mamajuana Cafe in the Inwood section of Manhattan , say they are paying about $ 11,000 a month for their 6,000-square-foot space , or about $ 22 a square foot annually -- considerably less than the going rate for restaurant space in Harlem , which is about $ 60 to $ 70 a foot off the main avenues and can rise to $ 125 a foot .