In Merrily We Roll Along, with music and lyrics by Stephen Sondheim, the traditional showbiz musical is turned on its head in this fable about friendship, compromise, and the high price of success. Directed by Adam Pelty, associate professor in CCU’s Department of Theatre. Coastal Carolina University, Edwards Black Box Theatre, 100 Chanticleer Dr. E. Friday-Sunday; again April 21-23; times vary. $18. (843) 347-3161, www.coastal.edu.