 For years now, that space has been like a ghost town. The nonprofit serves children with special needs and mental health needs, and it's been leasing a property owned by the town for well over a decade. The owner says the town abruptly decided to end their lease in August of this year. Ongoing construction downtown is being blamed for the abrupt closure of a Derby restaurant. Riverwalk Social indicated that their last day of operation was this past Sunday in the Elizabeth Street space.