How to convince wife for a swap

My self with wife are in our late 20s and very active in sex. I have a huge hunger for a couple swap and I have a feeling my wife will not agree this at first time. I dont wanna do it in the same room. Just wanna fuck another wife while her hubby fucks mine. Think it is safe and still everyone can enjoy another person. What are the ways to convince my wife for a swap. Shoot your best ideas.