Standalone luxury brand spas are poised to become the next trend. The latest opening is Augustinus Bader’s Skin Lab at luxury store The Webster in New York City. The Skin Lab, the first in the U.S. and second-ever location, opened Feb. 22. The first location, in London, opened in January as a partnership with health resort Lanserhof. Augustinus Bader, founded in 2018, joins a host of other luxury brands like Dr. Barbara Sturm and Biologique Recherche in creating its own standalone boutique spas, a deviation from the usual hotel spa partnership favored by brands like La Mer, Guerlain, and La Prairie. “Some brands try to 100{5b4d37f3b561c14bd186647c61229400cd4722d6fb37730c64ddff077a6b66c6} control the [sales] and…