I'm heading to New York in a couple of weeks and have 5 days alone there - just wondering what I should do? Maybe a walking/biking tour or something where I can meet others?
Have a look at http://peek.com/r83-new_york_new-/
Also,last time I was there there are some fun baseball cages to have a swing in on the West Side (you vs a machine) and there is the Noguchi museum which is quite a hike out if you're into art at all. almost 4 years ago