You are right, the era of Good Night Ladies and Show
me the Way is long gone, 'tho anyone over 60 (I am) might respond favorably to either, because familiarity is powerful. There's a sweet song (I think by Tom T Hall), It's Been Something Seeing You Tonight, that I've heard several people use as a show closer. I don't know how wide its currency is, but I suspect it will grow wider.