Hospitality company Sonder has officially filed for bankruptcy following the collapse of its partnership with hotel giant Marriott International. The San Francisco firm, which operated thousands of short-term rental units, including apartment-style and boutique hotel accommodations around the globe, filed for Chapter 7 liquidation proceedings in federal bankruptcy court in Delaware on Friday.In a legal filing, Sonder listed its estimated assets as between $1 billion and $10 billion and its estimated liabil ...