The 5th Avenue website is pretty good about putting on a "rating" for the show if you go onto their webpage, go onto their main list of shows for the season, and then click "more info" for the show. It's right after the show description.
The 5th Avenue is listing the Catch Me If You Can "PG-13":
Parental Guidelines
As a parent, you are the only person qualified to determine what is appropriate for your child. The following information is provided to help you make the decision that is right for you and your family:
Catch Me if You Can
PG-13
This show contains both adult language and sexual situations and may not be appropriate for all family members.
Alcohol: Characters are seen in bars and other locations drinking, sometimes to excess.
Adult Language: Characters make multiple use of strong language, including vulgar words ("bull****"), swearing ("Jesus Christ!") and the "f" word (used some half a dozen times).
Sexual Situations: Frank, the 17-year-old runaway, is an innocent at the beginning of play, goes through his sexual initiation during this adventure; he is seen in bed with stewardesses, nurses, Hollywood starlets, and a prostitute before he finds Brenda and falls in love.
Violence: FBI agents are seen chasing the main character; gunshots are fired, but no one is hit.
Xanadu! Can't cry on cue!