Yup. ALL venues, from Broadway theatres to concert halls to sporting stadiums/arenas.
This has been happening since the dawn of time AND I've been taking advantage of this scenario since I was a little kid and first learned that the best time to get excellent seats is the day of the performance/concert/game.
My rule is if I don't get the seats I want when they first go on sale, I don't buy anything and then wait until a few days before the event and start checking TicketMaster or TeleCharge. I ALWAYS get the first few rows for everything AND this on events that have a sold-out solid status for weeks/months prior to the performance date.
Thanks to this, I was fortunate in getting four tickets 5th row orchestra center for THE PRODUCERS, 4 months after it opened AND when tickets were impossible to get and crowds were camping-out overnight to get Standing Room Only tickets and premium priced tickets were also nowhere to be found. Same thing with WICKED a month into its run (6 tickets 8th row orchestra center) and 4 tickets 3rd row Floor seats for Madonna's RE-INVENTION TOUR.
My list is endless with the events I've managed to get this way.