Cafes are popular places for people to spend their time. Lots of people order coffee (or tea or hot chocolate) and camp out with their laptops, taking advantage of the free WiFi that many cafes offer to their customers. A cafe is also a great place to read, draw, study, socialize, wait for a friend, etc. If you spend long stretches of time in cafes, be sure to buy often and tip your baristas well in exchange for the prime real estate you're enjoying.
Most cafes sell pastries to complement the drinks, and many even offer vegan options!