Oh I don't know, depending on which rose he picks I have a lovely picture in my head of a rose entwined around a goal post.
He would need a hardy one, maybe one that could take a touch of frost, repeat bloomer would be good too and it would have to be one that is especially good to look at being in such a public place, not so thorny would be an asset.. Perfect Love springs to mind, I think that does well on a good strong support if cared for and handled right..................mind starting to boggle now.
Good luck
XX Jeannine