I'm in NYC and I don't have enough time to do all that I want. I work from 9-5 and get back by 6.
I have swimming, judo and gym. That takes about 2 weekdays (get back at 11pm) and part of a weekend day.
I also try to cook when possible, so that take 1-2hours a day. Toss in laundry, misc daily chores, unwinding and time with gf and friends there isn't too much for myself.
I could get a few extra hours by moving into Manhattan, but at a greater expense. A friend moved a few blocks south of Central Park and his rent is now 2x mine, for a studio not even as big as my living room. For a more reasonable sizing, I'd need to have a roommate or pay more than 2x, which is what I don't want.
As to your question, take up a hobby. Learn to cook. Learn a sport. Read more book. Explore the city.