I tried to pick something that wasn't an audiophile female vocal snore fest for the attendees.
I waffled back and forth between two selections which sort of summed up a couple big influential periods for me and music appreciation.
I skipped some of the BBC records that I remember from my first real introduction to high fidelity. My next door neighbors were a wonderful English couple. She was the Latin and English teacher at my high school and he was a university professor at my eventual alma mater. He had big BBC monitors, lots of vinyl and tubes. That was my first eye opening audio experience and made me start fiddling with the broken 60's vintage Fischer stereo system in our living room. It hadn't worked since before I was born and was more ornamental than anything else as a result. I fixed the amp and turntable, and re-coned the woofers in the speakers so I could play vinyl at home in our living room.
What I ended up playing for folks was from my late teen years. Growing up in a very small town (which doubled in size when university was in session) meant there wasn't a whole lot to do, especially on Friday and Saturday nights. So we kept ourselves occupied the same way a lot of other folks spent their nights in a small town. A couple of us guys would jump in one of our cars and cruise up and down Main Street, do a few brake burns and donuts, a couple stop light races, go ripping and tearing through back roads to avoid the RCMP, meet up with some girls cruising together, etc. etc. etc. No 50's cruiser music. This was more of a time for rock and heavier stuff. Something with a good driving beat... So I chose "New Orleans Is Sinking" by The Tragically Hip to play for folks at the get together with the idea of teenagers cruising in a small town as the imagery. All of the Tragically Hip's early albums are classics. If you've never listened, well worth picking up.