My first outing with D&D was on the cafeteria porch of my high school, at a picnic table on a Friday afternoon, after classes were done for the day. My friend John, who owned the Blue Book Basic Set was the DM, and my friend Rob and I ran two PCs apiece (I had Feahor the Fearless, a fighter; and the unimaginatively named Theron the Thief). We played in an expanded version of the sample dungeon in the book. I don't remember the details beyond the fact that Theron died in the first room.
That was the fall of 1978. This year will mark my 30th anniversary of playing RPGs.
This evening, I pulled out my 1st edition DMG (for the encounter charts) and the Yggsburgh campaign setting (for the maps) and ran some off-the-cuff C&C for my son. Mike the Trader (his 6th level Rogue) camped with some trappers, and saved them from an owlbear attack in the night. It appears the owlbear belonged to Karch, an evil wizard he's had problems with in the past. After a bit more journeying, he met up with his friend Gryffith the Ranger, and they plan on tracking the beast back to its lair. (To be continued, because bathtime rolled around.)