I was browsing through the old forum posts and saw a lot about how to deny guests a plus one, but not much about why or why not to do it? I'm just curious.
Our wedding is going to be fairly small (51 without counting plus ones; 58 with plus ones) and so we decided we'd be more than happy to pay for our single guests to bring someone along. I am certain that at least half of them will, while the other half would probably opt not to. Either way, it's in the budget if they do.
That being said, have you decided if you'll allow plus one's or not? Why or why not? Is it rude to invite someone who is single to a wedding (which is a romantic/family event) without a date? Do you have "rules"? (Must be engaged, together more than six months, etc?) 