Two million alien fanatics RSVPed to a viral Facebook event to storm Area 51, but turns out not that many actually tried to see if the truth was out there.

The Las Vegas Review-Journal reported about 100 people showed up at the gates at 3 a.m., the posted meet-up time in the Facebook group, and were largely civil, except for one arrested for urinating at the gate and a second for attempting or threatening to sneak under it.

So, it wasn't exactly a crack team of commandos ready to blow the lid off a massive interstellar cover-up. Crowds have grown throughout the day, with a circle of RVs camping out (including a Raiders presence), but nowhere near the millions who joined the viral event page.

Surely those who did arrive wanted to send a message to the government about UFO conspiracies, but were more interested in making some excellent alien jokes about saving ET and clapping alien cheeks, aka having extraterrestrial intercourse.

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Although the turnout may have been underwhelming, a parallel Bud Light-sponsored festival in Las Vegas called Alienstock at the Las Vegas Events Center drew much more impressive crowds. Proof that the masses interested in finding alien life are actually more interested in finding beer.

There's still time, events are scheduled through Sunday.

Scroll through the above slideshow to see the best costumes, signs, and stern looking security guards.

Dan Gentile is an SFGATE digital editor. Email: | Twitter: @dannosphere