The Winklevoss twins have a rock cover band called Mars Junction where concert-goers get a free NFT and are serenaded by the 41-year-old billionaires who play Blink-182, Nirvana and other 'soundtracks' from their childhood

• 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 for Facebook, and crypto moguls who started a $7 billion digital asset exchange.

Tyler and Cameron Winklevoss added another notch in their (most likely) expensive belts over the summer when clips surfaced of the two men performing Journey's "Don't Stop Believin'." 

In the video, Tyler is seen on stage belting the 1981 classic, sporting a wallet chain, while his brother Cameron is shredding the guitar at Wonder Bar in Asbury Park, New Jersey.

"Come rock with us," Cameron said on Twitter before the show. 

The 41-year-old billionaires weren't up for an impromptu jam session. The two were on tour as Mars Junction, billed as their "newly-formed hard-hitting rock band." The Winklevii, accompanied by four other bandmates, play covers of Pearl Jam, Blink-182, and Nirvana. 

Their shows are 90 minutes long with around 25 songs, and concert-goers get a free NFT, or non-fungible token. The band has merch too, peddling black t-shirts, hoodies, and tote bags. 

The Asbury Park video garnered lots of online attention with some describing the performance as akin to "drunk karaoke but with a live band." 

—Arch Nem (@arch_nem) June 10, 2022

Tyler says he doesn't care if you don't like his rock cover band, according to a 3,179-word blog post he wrote in response to a slew of unflattering media reports about Mars Junction.

"Admittedly, the Asbury show was a tough night for me. Our band has a big sound and the drums were up my ass. Even though I have in-ears, my mix was overpowered and I couldn't hear where I was," he said in June. "As a result, I missed a few pitches, went a little sharp here, a little flat there. Big fucking deal. Maybe next time I'll get it."

Tyler added: "Am I any good? I have no idea, but that's not the point! Am I improving? I think so. Am I trying? Very much so. But the contract I made with myself was that this was going to be about having FUN, first and foremost."

Mars Junction began as a pandemic project in 2020 for the Winklevoss twins.

Tyler said quarantine "provided that silver lining of an opportunity" to create some "personal space outside of work and linear accomplishment." 

The Winklevii grew up playing music, learning classical piano from ages six to 18. Tyler started off playing keys for Mars Junction, but later pivoted to being the group's lead singer. He even hired a voice coach. 

"[The piano] seemed like a logical starting point and ending point. But over time I felt like I should challenge myself more," he said. "Our time is short on this earth." 

Tyler said Mars Junction was also started as a way to feel closer to their late sister, Amanda Gesine Winklevoss, who died in 2001 at just 23 years old. She was a performer and the lead in school plays and musicals growing up.

"And as much as I tell myself this is about challenging myself in a new way, which it is, I am coming to terms with the fact that this is very much a way for me to feel closer to my big sister," he added.

In 2021, Mars Junction had their first performance at the Knitting Factory in Brooklyn, New York. Being in the band has been one of the most "exhilarating, terrifying, vulnerable, rewarding, and fun experiences."

"It was a major highlight of my life," Tyler said. "One that I will marvel at on my deathbed and one that ranks right up there in my mind with any other thing I've ever done in my life."

Mars Junction did not immediately respond to Insider's request for comment. 

Elsewhere, the Winklevoss' are facing heat over their cryptocurrency exchange Gemini.

The firm is trying to recoup $900 million of customer funds from crypto brokerage Genesis, and is facing a lawsuit from investors over the exchange's interest-bearing product.