sooo true. and al's is fucking awesome. also, try to get a reservation at A Single Pebble, as long as you have parents to foot the bill. probably the best chinese food you will ever have. this is not my biased opinion, there is legitimately consensus among people who have been there.
as far as shops go: if you have ever been on a longboard, you should check out Ridin' High at the corner of Battery and Pearl street. Maven is kinda cool, but overall a pretty generic street wear/skate shop. and definitely hit up the Ski Rack. it's waaayyy overpriced, but i've been in there all the time recently just getting stoked for the season. and don't be afraid to chat with some kids, ask them questions, etc. you'll learn a lot more from us than you will from your tour guide, and most of us are perfectly happy to share our thoughts/experiences with our respective schools.