Over in Northern Liberties, plastic igloos that seat two, four, six and up to nine are popping up poolside at the former Vesper Dayclub that has pivoted to a year-round high end steak-house by Glu Hospitality. The Greenhouses at Harper's Garden by FCM Hospitality will debut tonight with private seating for four to nine people. Starting this weekend, private heated individual greenhouses are taking over a Center City street outside Harper's Garden. Sweater weather is here and while outdoor dining is still having a record moment during the most challenging of years, Philadelphia region restaurants and attractions are getting creative to survive the cold weather.