Airbnb has emerged as the single greatest disruptor of the $500 billion hotel industry over the past decade, and with the peer-to-peer home rental giant gearing up to go public in 2020, a slew of startups have gotten in on the “alternative lodging” action. One of those companies is WhyHotel, a Washington, D.C.-based startup that operates pop-up hotels in newly built “luxury” apartment buildings. The company today announced that it has raised $20 million in a series B round of funding led by Harbert Growth Partners, with participation from Highland Capital Partners, Camber Creek, Working Lab Capital, Geolo Capital, Revolution’s Rise of the Rest Seed Fund, and former Bain Capital Partners MD Mark Nunnelly.