The point of an open discussion, in my mind, is to discuss things no matter one’s disposition going into them. The process you describe feels to me as exclusionary and seems counterproductive in my view when it comes to approaching discussion. In similar clubs (album discussion, etc.) there has never been option to veto for just this reason. People want to discuss a piece. One does not really want to participate in a group if they are excluded. If this is the system you want to prescribe to, that’s ultimately your decision but my interest in participating is definitely reduced if that is the case. 

Isn't the point of a discussion group/club approaching works you might not be interested in or dislike?

If our opinions here in this discussion thread are on how we want to proceed I am a hard ‘no’ on any vetoing/voting system.