I travel quite a bit to take pictures for folks. Included in my bag of tricks is my portable green-screen (which is reversible, with blue on the back). This makes it easy for me to do head shots and not have to worry about carting around a ton of backdrops or worrying if someone is wearing blue (or green) and having them disappear when I use my green screen software to apply various backgrounds.
A very simple setup, with two lights off to each side of my subject(s). I use the portable green screen pop-up behind and a green screen backdrop for the floor.
Okay, this looks a little weird, but you get the point, I remove the green and it leaves just the two subjects.
Here are two samples of the finished product:
