So I'm bouncing around on YouTube, and come across the old Saturday Night Fever tune Disco Inferno. I've been playing some disco in my band, and it usually goes well. So I'm watching the video, and am surprised to see two guys each playing bass. there's a guy on the far left playing a Jazz, and a guy on the right behind the guitarist playing a P bass. Anybody have any idea WHY this would be? I find it very strange. Thanks.