SAN FRANCISCO (KRON) — Hundreds of people lined the block outside an ordinary warehouse in San Francisco’s SoMa neighborhood Saturday for an exclusive invite to the Silicon Colosseum — an underground fight club with mechanical competitors.

An online invitation was sent to a list of roughly 2,000 people the night before the event. The sold-out crowd paid $30 per ticket for a chance to watch robots fighting robots.

“Ladies and gentlemen, esteemed guests and community members, investors in the future, and (of course) robots, l'm extremely excited to invite you to the first showcase of cutting-edge robotic supremacy,” the invitation read.

On the night of the event, the crowd gathered around a caged octagon. The preliminary rounds of the night started with volunteers facing off in “Taser kni

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