This. And for the record, if the audition starts at 7PM and you arrive at 7PM, you are late.
If you get a chance to prepare for the audition (i.e. learn songs) make sure you know them. I made that mistake one time too often.
And speaking of mistakes, if you make one (and you will) just carry on. I read an interview with a bass player who landed a pretty sweet gig even though he played more mistakes than anyone else. Afterwards the band said he played with so much conviction, they wondered if THEY were wrong ...
Not meaning you should get cocky, but accept that mistakes will happen, smile when they do and carry on. It's only a bum note in a song, after all.
Oh, and enjoy the experience
Blue has got a SERIOUS point here. I once went to an audition for a gothic rock band. Arrived on time (i.e. early) so I chatted a bit with the husband and wife (lead guitarist and singer respectively) and started saying I was taking lessons cos you can only learn so much on your own. The guy had never taken a single lesson in his life. Strike one. Then it turned out his wife and I went to the same school so we started chatting about our experiences. Husband didn't like it (I should mention at this point that I told 'em I have a gf). Strike two. I had cut my index finger on broken glass the day before, and while playing bled all over my bass. Despite it being a gothic band, they decided to go with someone else ...