He worked with many of the famous figures of that era including Joseph Rumshinsky, Arnold Perlmutter, Molly Picon, Jacob P. Adler, and David Kessler, and wrote or co-wrote more than fifty plays and operettas which were widely performed in Europe and the Americas.
[8][3] He would sneak out and attend Yiddish plays when he was supposed to be studying in the Beit midrash at night, and soon became acquainted with most of the actors in Lviv's Gimpel Theatre.
[8] Schorr first made a name for himself in the Gimpel Theatre when he contributed lyrics to a song in Di lustike kavaliern (The Jolly Cavaliers).
[5] He came with a troupe that had been invited to the Windsor Theater in Manhattan; he decided to stay and became assistant stage director there, and started writing lyrics for operettas.
[3] In 1906 Jacob P. Adler gave Schorr acting, lyricist and director roles in Malke Shvo (Queen of Sheba), which greatly raised his profile.
[11] He continued to release his own plays at the Arch Street Theater, but when their success was not what he had hoped, he began a new phase of aggressively collaborating and co-writing with many other writers.