This year for International Holocaust Remembrance Day, Adam Swig wanted to do something different. The San Francisco philanthropist, known in large part for organizing giant Jewish-themed parties and fundraisers, had recently joined Clubhouse, a new, invitation-only app that allows users to talk (or just listen) in group conversations. Topics range from entrepreneurship to electronic music to coping with ADHD. In December, Swig had a positive experience with the app, organizing an event called “Matzo Ball” in which attendees were asked which type of matzah ball they prefer: sinkers or floaters. Adam Swig So when the Holocaust commemoration day came around on Jan. 27, Swig decided to use Clubhouse to highlight the voice of Sami Steigmann, a survivor who lives in New York City. Jewish rapper Kosha Dillz was included in the program, and Swig advertised it as “The First Holocaust Survivor on Clubhouse.”