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The Winklevoss Twins perform in a rock cover band called Mars Junction. The 41-year-old crypto billionaires play Blink-182, Pearl Jam, and Journey. Frontman Tyler Winklevoss says he doesn't care if you don't like his singing. He's just trying to have fun.The Winklevoss twins are known as many things: Olympic rowers, the Harvard grads who sued Mark Zuckerberg for stealing the idea...