Last year, WoTC celebrated the 30th aniversery of D&D with a Nationwide D&D Game Day.
It has become an annual event now. Game stores sign up for it and host the games.
They send the stores the game kits which include the adventure, minis and other supplies to play the game.
This year the adventure is The Fane of the Drow.
If you want more info on it, check out the WoTC website. They got a list of all of the stores participating in the fun. So check it out, see if a store near you is hosting this, and then see if you can still get in.