What selections do you play when showing off your system to others?

I agree that we should invite them to bring their own stuff and/or select their own play queque.  It's the only way the music will get up close and personal to them.

But. I have to shamelessly admit that I take their keys away so they can't leave the premises until I get to play:

The King's Singers - Hard Days Night

Carole Horne - Noboby Knows

SRV - Tin Pan Alley

I have voice control in my streamer, have them talk into the remote and it plays whatever song they say. It’s a blast as we pass the remote around the room calling out songs.

I agree with the sentiments written by @millercarbon and others: let the listener choose. If a music selection is not increasing brain [dopamine], your guest will not enjoy the listening session. Worse yet, if they actually dislike the music playing, they will find an excuse to leave the room and quietly, or openly, question the wisdom behind your expensive hobby! If it was just about the sound quality, I wish I could play, “The Power And The Majesty” recording of the steam train! I heard it once, over 40 years ago, at an audio store in Richmond, VA. Have a great day!

Temptation - Diana Krall

Spooky - David Sanborn

On the Beach - Chris Rea

I Can't Tell You Why - Diana Krall

The Look of Love - Diana Krall

A Venture - Yes

It Keeps You Runnin - Doobie Bros

I usually ask what they like and try to start off with a taste of that. Maybe a couple tracks and then throw in a few pieces that really perform!   Maybe Supertramp, “School” from Crime of the Century (either HiRez digital or the record).  Maybe Yes, “Roundabout” Fragile, from HiRez dsf./SACD file.  Maybe some Neil Young “Comes a Tome “ or “Look Out for My Love” off Comes A Time from analog remaster vinyl.  Sting “Island of Souls” from Soul Cages, 44.1 digital.  Black Crows “She Talks to Angels” off Shake Your Money Maker, 44.1 digital file.  Genesis “Firth of Fifth” off Selling England by the Pound”, dsf./SACD digital file. Jesse Cook “Beyond Boarders” off Beyond Boarders 44.1 digital file.  And whatever else they like. 
 

Of course I don’t play all these for everyone but just choose some tracks that the person may like.  Doesn’t work if they hate the band or type of music.  But sometimes the music they like is a terrible recording.  Most of my friends aren’t really into classical much but maybe a little jazz or progressive rock, classic rock and varied other styles.  I’m not stocked up on county or Nashville stuff.  Sorry.  Everyone has a different taste!  So try to play to they’re taste if the recordings are good.