Did you know a fella by the name of Samuel Clemens was a heckuva musician? Piano, guitar, banjo and harmonica, plus spiffy tenor voice. Hear and see it during An Evening with Mark Twain at the Dennison Theatre. Caveat: this is not the ghost of Mark Twain. Or is it not not the ghost? $16.50/$11 seniors and students. Visit griztix.com. Pub trivia answer: The average length of labor for a first-time mom is 16 hours.