This medium activity belongs to the “gathering data” stage of sprint retrospectives. It works well with teams that are forming, storming, norming, performing, or adjourning.
Set a timebox and collect topics for discussion. Each person dot-votes on their two preferred topics. After talking about the highest-voted topic for five minutes, do a Roman vote. If the majority gives a thumbs-up, continue for another five minutes. If not, move to the next topic. Repeat until the timebox ends.