What are the benefits of the two different photo-booths or for lack of a better term, the Pros and Cons?
First, I believe the main thing to remember is behind the curtain or open air is more of a preference than a right or wrong booth for the job.
Behind the curtain photo-booths are more of a tradition nostalgic sit-down booth. When someone says photo-booth that’s what comes to mind. A booth with a curtain that you and your friends or lovers would cram into at an amusement park, arcade, shopping center or while on vacation. To give you that memory to hold onto for years. What happens behind the curtain stays behind the curtain, or at least until the images are printed. No one can see you and what goofy faces you're making or maybe having that kiss from that special someone in your life.
You can fit anywhere from 1 to 8 people comfortably in the booth, but I have seen as many as 12 people cram themselves behind the curtain and laugh with every flash.
Open-air booths are just as fun, but nothing is secretive; everyone can see your pose or your guest can try to join in. Because there is not a curtain or bench to sit on, you can fit more people in front of the booth's camera. Backdrops are part of the open-air booth that can be customized to fit your event, with anything from a beach scene, to a sparkling black and gold backdrop. Behind the curtain booths are more of a white and or solid colored curtain.
Both booths are great fun and can give your guests memories that will last a life time. Which booth is better for your event, is up to you, there is no right or wrong answer. Just remember to grab a prop, smile, and capture a memory.