We all have different perspectives of things.
Some people absolutely love going to a concert, and having five pints before they go in.
To me, the whole point of going to a concert is to take in as much of the event as is humanly possible to take in, not to completely numb your senses with a depressant. You might just as well take your phone and a set of headphones and listen to another artist while the artist on the stage is unsuccessfully trying to impress you.
Still, each to their own. These people buy a ticket, don't they?