If you keep meaning to start a new sport and keep finding excuses to put off the first session, Ümraniye Belediyesi Necip Fazıl Yüzme Havuzu ve Spor Merkezi over in Beykoz could be the starting point. Gyms and facilities get packed at prime time, empty outside it — know your hours and you'll catch the quiet sessions. The first few weeks are the hard part; after that the habit runs itself and motivation stops mattering.