Whenever I am near Chinatown I drop into Columbus park for a look-see. Good place to practice your candid skills. I walked through and shot about 35 photos in 20 minutes.
No one bothers you, most too occupied playing and watching. I got to get a few feet away with the fisheye. The last photo with the elbow, I'm just inches away from him. You got your tele and you got your zoom, even a 50mm will do. You should have no problems, just move around. Th ability to keep moving is the key to street work....aka hit and run!
Here are a few of them. I like the ladies with their exam gloves!