That is true, the "little theater" had appeared in the United States in 1905. These little theaters were very pivotal in giving other theaters a chance to branch out to different places out in the U.S. other than New York.
"Early" and "reluctantly" are adverbs. "Early" helps the verb "retired" by telling when. "Reluctantly" describes how the baby boomers feel about "looking" for another job. Hope this helped. :D
