The invites for our wedding only come with one envelope, not the two I'm used to. So I'm not sure how to let my single friends know they can bring a date to the wedding. What I've seen before is the outer envelope addressed to the person and then the inner envelope usually says 'James Smith and Guest." So how do I indicate this when I've only got one envelope to work with? Also how do I get the name of these guests so it can go on the list with the dinner choices that I give to Mahan's? TIA!!