At ISPED, the research institute where I work, we have a weekly Ph.D. students seminar. It is an informal meeting of (more or less) all the Ph.D. students of the institute, bringing together people from epidemiology, medical informatics, biostats, etc. Each student gets 20 minutes sharp to talk either about his/her research or any article of his/her choosing (possibly a little bit outside of our respective research domains), followed by 10 minutes of questions.