Once they see that it is fun, you should have no problem getting them to group up and write their own skits. Sometimes you have to help them find a situation with which they can work. Give them ten minutes and then have them present their skits. Idioms ESL students are always interested in learning new idioms, but giving them a list from a text is not enough. If you have ever listened to a non-native speaker attempt idiomatic language straight from the text, you will understand just how culture contexted idiomatic language is.
Idiom usage is highly context embedded in whatever language the idiom evolves from.
Demonstrate the context in which it is used and some of the body language that goes along with it. Do this with other idioms as well. Also, if you have internet access, the ESL Cafe is a great idiom resource. On some small pieces of paper, write down real life situations that require some advice. No matter what I try, nothing seems to make me happy.