The incident was reported outside the Broadhurst Theater just after 11 p.m. on Friday night.
Authorities say the man stood outside the stage door amongst a crowd and groped and brushed up against three different teenagers.
The 15-year-old, 16-year-old and 19-year-old victims did not require medical attention.
The suspect is described as about 55 years old, 5 feet 7 inches tall and about 215 pounds. He has brown eyes and balding grey hair and was last seen wearing a beige baseball hat and a blue and yellow striped shirt.
Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).
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