The prices for airline seats within the same class go up and down depending on demand. Now the notion of “demand-based” pricing is extending to live theatres. Last year the Boston Ballet raked in an extra US$160,000 by charging more for much sought after shows and even seats within the same area of the theatre For example aisle seats fetch a higher premium just as aisle and exit-row seats do on jets. Theatres love it: New York City’s Alvin Ailey American Dance Theatre added US$1.9 million in revenue in 2008. Can Canadian theatres be far behind?