Follow any trend to its exhausted end, and you may end up at Mr. Purple, a lounge on the 15th floor of the Hotel Indigo on the Lower East Side. It’s the kind of place where buzzwords like “reclaimed wood,” “small-batch spirits” and “regionally brewed craft beer” feel like PowerPoint concepts introduced in a focus group. Mr. Purple has held events like a Moët & Chandon party and a December celebration for Patricia Clarkson’s film “Learning to Drive.” (Hosts included Martin Scorsese and Bradley Cooper.) Visitors on a quiet Friday in January included women in black onesies, skaters and couples chatting on couches. “We like that eclectic mix,” Mr. Gerber said.