One idea we had was Tijuana, since I am under 21 and would have limited nightlife options in the US, and also because I think it would be cool to just check out something new and interesting.
Would walking around with a backpack, taking photos be a really bad idea in Tijuana? I mean, anybody could spot that we aren't even from your HEMISPHERE just by looking at us.
On a sidenote, while on this trip I will be less than a month younger than 21, would this count for anything in the US? Anybody have personal experience with bouncers being understanding?