http://www.fiveholeforfood.com/the-tour/calgary/
Tuesday is the annual visit from the Five Hole for Food traveling street hockey game. They play from 2 to 6pm at Eau Claire Market and are accepting money or canned food donations for the Calgary Interfaith Food Bank.
I'm told they have some sticks, but it would likely be helpful if you bring your own.
I haven't been down before during their previous Calgary stops, but apparently a good time is generally had by all.