You don't say how big your plants are, or any clue as to where you're from, but if the spinach, cabbage, kale and broccoli are fair size plants, a bit of frost really won't hurt them. As a matter of fact, they tend to enhance the flavor of things like kale, broccoli, and other winter greens. I've had beet plants fair well the few times they've been exposed to frost.
If the bean seeds are only in the ground and haven't sprouted, I can't see where there's any need to do anything to them. They don't like it when it's cold, so that may set them back from sprouting until the temperatures and soil warms back up again.
Things are so different for us gardeners. My beans have already produced and have been pulled since they were done, and that was bush green beans and soybeans I use for edamame.
Do yourself and us a favor and add where you're from to your sig line, or at least which growing zone you are in so folks in your climate can chime in with their take on things.