Aritzia is my all time favorite store for casual clothing and work clothing. My favorite brands are Babaton and Wilfred. A lot of the clothing pieces I buy, I try to wear them for both work and casual situations. Aritzia clothing pieces are a little expensive, but it's totally worth it if you catch the items on sale. I only bought two items, but here is what I bought:
Wilfred Lafond T-shirt Soft, slightly sheer shirt that is surprisingly warm. This shirt works for me because I actually wear it with a black pencil skirt out like how it is styled on the site.
Wilfred Alsace T-shirt Lacey, sexy shirt to wear on a night out. I would even wear this in the office with a solid black tank underneath and a blazer over it.