The tap shoes are on, the ballet slippers tied and the members of the chorus line are ready to kick their heels high.

And on Thursday night, they will do so as the curtain rises at the Martha’s Vineyard Regional High School Performing Arts Center for the opening performance of A Chorus Line, the longest-running American musical on Broadway.

To the untrained eye the scene was this: two adults on stage, one speaking in an English accent, the other in a cross between a buccaneer’s snarl and a schoolyard bully. Five kids looked expectantly at their director, an adult on hands and knees, who crawled dramatically across the Vineyard Playhouse stage. The cast watched seriously for a good half-minute before all, director included, erupted into uncontrollable, side-clutching giggles.

The good thing about January is that it isn’t December. December, of course, is when we spend too much money on presents, stress out that we’re compelled to send cards and letters, attend parties and fundraisers, and string up tired decorations. Or we’re feeling guilty that we’re not doing any of those things. But on occasions during each Christmas season, we’re bound to partake of an event that makes it all worth while. A performance of Amahl and the Night Visitors is one of those occasions.