In order to boost slumping luxury apartment sales worldwide... real-estate developers are getting creative with amenities to recruit millennial buyers. Monohaus in East London is getting equipped with a craft-beer bar, vinyl music shop, and Nordic café that serves avocado toast. The industrial apartments will start at $635k for a one-bedroom. 550 Vanderbilt in Brooklyn will offer a rooftop farm and garden terrace with condos starting at $890k. Childer's Street in London will offer an on-site movie theater, communal workspaces, and Sonos music systems. Goodbye lonely apartment gyms,