reply to ssetta's 2405 answer again
that's a surprise ssetta, that it had the Barkley/Kids credits, because that episode is from the late 80's and by that time, usually Friday episodes that ended at night always had the credits scrolling over New York at night, like episode 2615 did.
I realize that episodes that ended at night usually had the xylophone music only if someone is shown sleeping, but someones there are exceptions to that rule too, like episodes 2622 (which can be found on youtube) and 3008. Like, in 2622 Gina takes Barkley home at the end, and Gordon stays with the turtle as the sponsors are announced over the xylophone music even though they are not sleeping.
I just saw pics of episode 2571 on the muppet wiki site. And for the closing street scene, Hoots and his band are playing The Grouch Blues near Oscar's can. When they finish the song and leave, the sponsors are announced. So for this episode, which music was played during the sponsors? Because maybe it had special music instead.