all good advice , dont know if its too late but heres my tuppence in the cup
had a singer audition for a band i played in a while back, she spent time between
songs sending and reading text messages and wondering why the amps were buzzing and popping
as she sent messages. needless to say she didnt get the gig, switch yer phone off just incase you get
a call or message from a well wisher.
and as others have said if you dont feel the groove with them musically and as people then
mabe theyre not the band for you, if they want you, ask yourself do i want them??
drummers are generally a bit mad but its gotta be a mad that you like, he/shes the most important
one in the group after the bass of course.
just turn up early, setup the way you always do, be sensitive to volume, enjoy the experience,
and good luck, i hope its the band for you dude.