Andy Karl has appeared on Broadway in the original productions of “Legally Blonde,” “9 to 5,” and “Rocky the Musical.” His wife, Orfeh, played Janis Joplin in the Off Broadway show “Love, Janis: and also starred in the Off Broadway hit “The Great American Trailer Park Musical.” Tonight, husband and wife appear together to celebrate the Great American Songbook. Jazz at Lincoln Center’s Appel Room, 10 Columbus Circle, Broadway at 60th St., fifth fl. Feb. 20, 8:30 p.m. Tickets are $60-$225 at jazz.org.