TACKY. Sorry

And technically it is not proper etiquette for the MOB to host the shower. BUT! To each his own. If I were very close to the bride and I were invited to a bridal shower at Pizza Hut and there was a venue change, I would still go along with it. It's about the bride (and groom) and supporting her (and them). But you can bet I would at least roll my eyes at the invitation. I may be an etiquette snob but I would not let anyone there know that I felt it tacky. THAT would be extra tacky - you just go and be kind and as generous as you are able.
However, if the bride was not a family member or close friend, I wouldn't expect to be invited to the shower in the first place. (Note, the OP is not saying how many people are invited but a PP mentioned a baby shower that had 150 people invited). At what point did the guest lists to these things become so over the top inclusive?! Let's face it - it's a call for a gift and I find it tacky when people invite everyone under the sun and not just family and close friends. Just an aside