There’s a lot of spirit in Theatre By The Sea’s expensive production of The Music Man, a show that fills the stage with so many set pieces and dancers that it’s a wonder everyone isn’t constantly crashing into one another. Jason Ostrowski leads the cast of dozens as Harold Hill, a midwestern con artist who hoodwinks the citizens of River City with tales of starting a brass band. Important reminders are there about the importance of music education and the value of public librarians, but there’s also a love story, a barbershop quartet, an anvil salesman, and a big musical number where everyone says the word “Shipoopi” a lot. (It’s very wholesome.) The show’s best lines belong to the highfalutin’ mayor (Tom Gleadow) and his Florence Foster Jenkins-like wife, played by the actress Lorinda Lisitza of Porcupine Plain, Saskatchewan.