A Sales Office on the High Line; 100 Ways To Fix the Subway

WEST CHELSEA?Sherwood Equities' High Line-adjacent luxury condo project at 500 West 21st Street has been a long time in the making, but ground has been broken and progress is being made on its 32 units. Also under construction, however, is a separate, stand-alone sales office across the High Line on another lot Sherwood owns, which is catty-corner to 500W21 but doesn't have air rights beyond the first floor because the developer sold 'em for more than $10 million. In the world in which we currently live, sales offices have posh trappings, too?this one, rendered above, will have 30-foot ceilings and a roof garden. Sales will start by the end of the year (at about $2,500 per square foot), and then after the office isn't needed anymore, Sherwood will look for a restaurant or gallery to rent the space. [CurbedWire Inbox; previously]

SOHO?Transit advocacy group The Riders Alliance is hosting a one-night-only pop-up art show tonight related to School of Visual Arts student Randy Gregory's extremely nifty Tumblr, "100 Improvements to the New York Subway." Attendees at the event will vote on their favorite fixer-upper ideas, and the top three will be forwarded to the MTA. The event runs till 9 p.m. at the Soho Gallery for Visual Art at 138 Sullivan Street. UPDATE: The three winning ideas were putting USB ports in subway cars so riders can charge electronic devices, replacing Metrocard swipes with a modern, contactless system, and harnessing wind power from oncoming trains. [CurbedWire Inbox; official; previously]

TRIBECA?A tipster sent us a close-up shot of the construction of the Jenga tower that is 56 Leonard, writing, "Here is a detail shot of a floor plate from 56 Leonard. Nice detail from Herzog [&] de Meuron." Upon further clarification, what makes it special is the curved edge, a concave indentation that will run up all 60 floors. Those who can appreciate that, please go ahead, and do tell us why concavity rocks, architecturally speaking, in the comments or via the tipline. [CurbedWire Inbox; previously]