>>95885051 (OP)For an in-person, one shot game I sometimes will, especially if it's for something like a convention. Throwing some set dressing around and having props for people to wear and handle can serve to get people in the mood to do proper RP. I remember running a Delta Green game set during the Vietnam War, where I gave all my players helmets and either webbing or flak jackets to wear, threw some tunes on and covered the walls in camo netting and period posters. It was a good time.
I also LARP so I have lots of random kit kicking around anyway which makes it easier