I only play and handle records in bare feet.
My knees got so bad from the pounding when running, that I was starting to hurt walking barefoot on the hard house floors. So I started wearing all rubber sandals at the recommendation of a fellow runner.
The all rubber sandals had the added benefit of not introducing static when handling records and equipment controls.
I found this information helpful.
"The best combinations of materials to create static electricity would be to have one material from the positive charge list and one from the negative charge list."
http://www.school-for-champions.com/science/static_materials.htm#.WkQvRVWnGM9