Nearly all grapes are pruned to one stalk. But if you wanted you could do two and send one one direction and the other the other direction. There are some excellent grape pruning videos on youtube by the Dave Wilson Nursery, a search engine should turn those up. Pruning is something watching a video is very helpful for, there is a real art to it which it is hard to explain. One extra complication for grapes is there are many different styles of pruning and you will need to pick one. I do spur pruning with a single cordon, probably the most common form.

Scott