I have a climbing rose. Well, I think it's a climbing rose. I got it from Publisher's Clearing House and sometimes what I ordered from them isn't what they sent. That's all I'll say about that. But the rose is now about 3 years old and blooms beautifully and I have it in a barrel with a tomato cage over it. It's not very tall but that might have something to do with the fact that last year the deer ate it down three times and this year the deer ate it down twice before I finally wised up and got a fence put in. I have an arbor with two wrought iron "boxes" on either side. I think you're meant to put a pot inside the box, but me being me, I decided to put ground cloth around the insides of the "boxes"(to keep the dirt in), held in place by clothespins, and then I filled the "boxes" with potting soil. I have already transplanted a grapevine into one side. What I'm wondering is if I put the climbing rose on the other side, will the two coexist when they meet on top? I was thinking the grapevine could just curl around the rose branches. I tell you, I don't do anything normal when it comes to my poor plants.
I think if the rose has thorns that you might regret doing that in the long run. It would also make it a bit difficult to prune your grape vine as you'll need to do to get a good harvest.