Take music and lyrics by Stephen Sondheim and a book by Burt Shevelove and Larry Gelbart. Then add on the years of experience of the cast and crew of A Funny Thing Happened on the Way to the Forum at Vero Beach Theatre Guild and you’re pretty much guaranteed to have a rollicking good time between the March 12 opening night and the closing curtain March 31. One of the things the Guild does so well is a well-written farce and farces don’t get much better than Forum. Greg Harris