Is it okay for me to be a drunken smartass?
What makes you want to do that?
It's fun, and people think I'm funny when I'm like that.
That's fine for your friends, but you should not do that around others. People will think you are annoying and not want to be around you anymore.
Fuck them all.
You shouldn't take such a cavalier attitude toward others, even strangers.  While you and your friends have fun being drunk and disorderly, other people are just trying to enjoy themselves as well.  If you want to be rowdy, try to do so in your own homes, and not in public.