I am the definition of introversion (to myself, avoid crowds, do not need to chat with everyone at the party, content with silence that others think is awkward, definitely do not want to ever be the center of attention, like to be alone with my thoughts ...)
"What, you don't want to go to the Nicki Minaj concert?" "Let me explain. You see, I'm an introvert...."
I have been to concerts by myself just because my friends do not like Coldplay, or would not pay a hundred to watch Jay Z, or just wanted to be out of the house. Guess what? I always had a blast.
I have been to the movies alone. My ex girlfriend used to hate me for this one. So now I do not tell anyone I date when I need a freaking night alone at the theather. It's my dirty little secret.
I go clubbing mostly by myself because my friends like to go to places I do not like. On top of that I am shy, but boy do I talk to girls. "It takes one man to talk to girls", you do not need a wingman to talk to girls. You only need a nice smile, and attitude.
I do not like hiking, true, but I do take shorts trips in remote places where it would be advisable to have someone with you. I prefer to do this alone. Danger or not.
I do not like smalltalk, because it is just that smalltalk, but I understand society deals with me as I am so I make an effort to deal with society as it is, hence I do the smalltalk in order to find something that may appeal. You almost always find it within a minute.
EDIT: Introvert does not mean antisocial.