The Drama Group is looking for 20 singers, dancers and actors of all ages to audition Jan. 20, 22 and 23 for the upcoming production of “The Secret Garden.” No appointment is required, but those auditioning should prepare a song from the production or a similar musical, and expect to read from the script and learn a short dance combination, said Mary Lee Hoganson, who is directing the show. “The Secret Garden” is a Tony Award-winning musical based on the children’s book. Its focus is on hardship turned into hope and beauty discovered in unlikely . . .