Everyone has a good point, If it's vining it will have tendrils, If not it is of the bush variety. (good example is with beans, pole,ground)
The problem with summer squash is you really don't want to handle the plants stems or foliage.......especially without gloves.........OUCH!
But the plants are delicate and fragile. If you try to train them they will crack or split, big chance of encouraging summer beetles, and the possibility of transferring early blight or bacterial wilt from plant to plant. I usually plant squash in the raised beds, but last year I put a few into some 18 gal containers. That worked out pretty good, the plants sprawled over the sides and the fruit was easy to pick. My English, Armenian, and Straight 8 cukes all grow on a mesh netting, with a little help with some occasional training.........vertical growing keeps the cukes straight
Greg