This is one of the most scenic places you can work at in Kazan. Situated on the 25th floor of the Korston Hotel and Mall that could give the world's sky bars a run for their money, it's easily accessible to the public and after connecting to the network, just enter in your email in the window that pops up and you can use the connection for as long as you want.
Extra Lounge is open 24 hours, but at night it turns into a night club (not recommended for digital nomads between 8pm-6am) however you can come as early as 6am and enjoy a five star breakfast (average meal USD$2-$5 and coffee is about the same depending on what you order). They don't mind if you stay a while, as the hotel is known for its international business guests. Staff also speak great English as well as other languages. The interior may feel intimidating, but they are more than happy to have you there; just be sure to order a drink or two every 1-2 hours.