It's convenient there's a Chatime right by the Markham Theatre! Before waiting for your show, or perhaps after the show, it's great to just chill if you need a place to sit.
The line up can be long depending on the time but the service is decent. The environment can be noisy, but it's a decent amount of space.
For the matcha latte - make sure you mix it before poking the straw in, or you can just stir with your straw. I would recommend it with just the regular amount of sugar ;)