(Photo by Thiago Prudêncio/SOPA Images/Sipa USA) Clubhouse is a small but quickly growing audio-based, invite-only mobile chat app and social network owned by Alpha Exploration Co. In what feels like a combination of talk radio and podcasting, the app allows its users to weave in and out of digital spaces known as “rooms” to listen in on live conversations between featured speakers, known as “hosts,” and their guests, as well as to join “clubs” of interest. Clubhouse rooms and clubs span many topics, everything from vegan fashion to bitcoin, theoretically offering something for e...