what is the orchestration for hairspray?

Hi! In general, you can find the orchestrations for a show by going to the show's web page. In this case, go here: https://www.mtishows.com/hairspray. Scroll down and click the orange "Materials and Orchestration". The button is below the "Bring the original Broadway choreography to your stage" drop-down tab. 

For Hairspray, the Orchestrations are: Bass, Cello, Drums, Guitar 1 & 2, Keyboard 2 & 3, Percussion, Reed 1 & 2, Violin 1 & 2, Trombone, Trumpet.