I wouldn't do that unless your friends are instructors. What happens when you screw up and you have two rated pilots up front? You both burn. You already know how to fly, why waste time/money doing something that doesn't take much practice?

Flying from the right seat isn't any different than the left seat. A little different muscle memory but guess what? Push yoke forward, cows still get bigger. Visual cues are slightly different, However in a cessna or piper you're only a couple feet from where you used to sit. If you just use your left leg to line up centerline instead of right (how I taught my students) you'll be fine.