She opened the Lotte Berk Method studio in New York City in 1971 , where it operated until 2005 .
One of Berk 's students , Lydia Bach , brought barre to the United States .
Berk opened the Lotte Berk Method studio in New York City in 1971 , where it operated until 2005 .
One of Berk 's students , Lydia Bach , brought barre to the United States .