East Side Mario's is a Canadian chain of casual dining restaurants, managed by its parent holding company Recipe Unlimited.

In February 1980, Sudbury, Ontario, entrepreneurs Nick Perpick, Ralph Roy and Gary Ceppetelli, opened the first Casey's restaurant.

[citation needed] As of 2010, three members of senior management retained 18% ownership under Prime Restaurants,[3] with the other 82% belonging to Fairfax Financial Holdings Limited.

In October 2013, Fairfax exchanged ownership of the Prime Restaurants brand, by selling to Cara Operations with a warrant and cash deal.

The menu primarily offers Italian-American style food, with an emphasis on pasta, as well as classic entrees, such as pizza and chicken dishes.

[9] In some tourist venues, such as airports and ONroute service centres, the chain also operates smaller East Side Mario's Pronto!

[1] Similar to other restaurant chains, East Side Mario's has a longstanding promotion that offers free meals for young children, marketed for families.

In 2010, East Side Mario's took advantage of the FIFA World Cup and launched a campaign, declaring itself as the "soccer headquarters".

[9] This campaign was launched in conjunction with an ongoing social media strategy in which East Side Mario's uses its presence on Facebook in an effort to raise awareness of promotions among consumers.

[12] In early May 2010, it was the national family restaurant sponsor of the 2010 Canadian Breast Foundation CIBC "Run for the Cure" fundraising event.