I'm going to a hey monday, stereo skyline, the friday night boys, and this providence concert in two days!?

my question is can you meet the bands without meet and greet tickets?and is it before or after they perform?and wheree would we go to meet them? i'm also making a shirrt. any ideas for that? i really like hey monday and stereo skyline but i think i should put the friday night boys and this providence on there too because what if i meet someone from those bands lol. any ideas on what to put on the shirt?? i'm probably putting lyrics from all of the bands songs. and maybe band members. any other ideas?