Head towards the restrooms and down the stairs for more space. No music downstairs. Food carts next door and close to several other shops in the Alberta arts district.
This place gets extremely crowded, so if you're not here by 1pm, probably best to wait for another day. They do have a lot of seating though, including the main room, a downstairs basement seating area, a patio outside and a garden seating area in the back. I can usually find a spot, even if it's not the one I want.
The best feature about working from a tea house is that it's usually a lot quieter than a coffee house - no loud machines or baristas knocking the espresso spoon-thing on the counter. Townshend's can get a little loud with conversation, but overall is a great place to work.