For me it depends on the venue and the audience ... if it's a dancing crowd, very little patter, except for maybe "... here's a song recorded in 19something by whomever..." if it's primarily a 'sit down' we're just hear to listen audience, I will add a little something about the song or the artist(s) that recorded it ...

PS: I LOVE listening to Elvis' original SUN Label recordings: That's All Right,Mama; I Don't Care If The Sun Don't Shine; I'm Left, You're Right, She's Gone; Blue Moon of Kentucky; etc. guitar, stand up bass, high hat cymbal, snare, bass drum ... simple ...