Teen Gothic

I have just turned 18 in my country peru legally I can enter bars and gothic events but as it is an informal country the truth is that you can enter being a minor inlcusive, this year I have already met people from the scene. But I know that in the United States you can't go to a bar until you are 21 years old which leaves me with the intrigue. How young people can make gothic friends being unable to attend these events? I am wondering this because I will be in Delaware soon.