make as many prints as you can afford and at the show, put them everywhere.
they only say no because they think they can. if you just go ahead and show your work in a different way then youll either just piss em off, or maybe get respect off them. like when my friend was at some shitty music college and on the night of the show, they said at the last minute that they couldnt play. no time ,whatever. but they just went and plugged in when everyone was busy running round trying to sort out the next band.
they got a long song out before they were kicked off.
they got a lot of respect off everyone too for doing that.
if you cant win by the book, fuck the book/