Your question is rather broad, and I know nothing of the theater system in India. Depending on your budget, I would use Magento Commerece (http://www.magentoco

Your question is rather broad, and I know nothing of the theater system in India. Depending on your budget, I would use Magento Commerece (http://www.magentocommerce.com/ http://www.magentocommerce.com/). I have used in the past and they have a large variety of extensions, some community driven and some commercially driven. It is written in PHP and uses the MVC pattern.