In Montreal since the late 1950's, there have been many audio shows organized in hotels almost annually for a weekend. Now, it's an A/V show still put up in a hotel in many rooms..
At the time of the audio shows, most rooms were occupied by manufacturers' reps where you could get accurate answers to you questions, compared to answers that you would get nowadays from a store salesperson who doesn't know bugger-all on the stuff which he/she sells.
To my recollection of the period in the late 1950's to the 1960's, manufacturers' reps were not the type to crank their equipment. But now some of the store reps are the ones who like to crank their equipment. I no longer go and visit those shows every year as I did many years ago, even if it's now free for a person of my age. There isn't much new that is interesting and I'm not looking for new stuff.
Moreover, I CAN GET ALL THE INTERESTING INFO ON NEW PRODUCTS FROM THIS WONDERFUL SITE.