On a somewhat related note, friend told me the other day about a wedding invite he received that was a specific "no plus one." He's single anyway, so he was like, "cool, I'll dance with a bridesmaid or something." But then he received an invite to a couples shower for the happy couple, which he declined because a) he's single and b) kind of a weird mixed message to send after the no plus one invite. I told him I hadn't heard of that type of thing before, but I'd have done the same thing.