How early should I arrive at an All Time Low show in New Hampshire to make sure I'm front row?

On August 1st I'm going to the Gimme Summer Ya Love Tour. I've been to a bunch of concerts but usually they're smaller venues. I'm going to the Hampton Beach Casino Ballroom and I wanted to be first in line. I know that the Hustlers Club gets early entry but I'll push in front. Also in your answer, can you not give me a ridiculous time, this is New Hampshire, not NYC.