Show them the ropes 

1. To orient a person who is new to your group/neighborhood/city/and such to the rules and modes of operation of the aforementioned.

2. To rough up someone that is in - or against - your group, as a punishment for going against the creed/rules/modus operandi of your particular group (re-orienting them, as it were).

1. "Terry, since you're new to Humboldt, allow me to show you the ropes."

2. "They ratted on David. That's not our style. So we're gonna show them the ropes."

Show them the ropes by Kent Weirdo November 28, 2005

Show them the ropes 

of opera origin, many back stage ropes control curtains and other theater devices.

I needed to show them the ropes before they could work backstage.

Show them the ropes by tracy volney December 28, 2005