I wouldn’t necessarily describe NYU as a “hippie” school (or even The New School for that matter). You need to be a tad more clear on what you mean by “hippie.” Do you mean artsy? Weed-friendly? Politically left-wing? Into an alternative or indie music scene?
You will find hippies at any school, but they may be more prevalent at LACs than at big universities.
Also, we need a bit more to go on (what are your stats?, where do you live?, etc.).
Does it have to be IN a city or is commutable distance to a city okay? (If the latter, Sarah Lawrence comes to mind…).
It’s probably smaller than you’re looking for and fairly intense academically, but Reed in Portland might be worth considering.
Also, not urban but not too far from LA with good transportation available, Pitzer. (It’s an LAC within a consortium)
Also, are you a woman? Would you consider a woman’s college?