[Flash mob (n.): an organized event where people gather to do a predetermined action, in a predetermined place at a predetermined time. Usually harmless and funny. Think massive pilow fights in town centers. Usually organized on the internet. —Courtesy Urban Dictionary]

Want to help outdo this flash mob in Rome, paying tribute to the new season of Fox TV show Glee? (The second season of high school glee-club antics starts April 13.) Seattle has its own in the works for Saturday, April 10, but no one’s saying where—that would ruin the fun. If you’re interested in joining, there are rehearsals at Century Ballroom in the Oddfellows Building on April 2, 6:30-8:30pm, and April 9, 6-8pm. If you can’t make it, use the Rome video as a tutorial and listen for hints of "Don’t Stop Believin’," "Proud Mary," "Gold Digger," and "Somebody to Love" around town on the 10th.

BONUS: See a sneak preview of Glee’s second season opener at Experience Music Project on Wednesday, April 7, at 6:30. Tickets cost $15 and all proceeds go to the Grammy Foundation’s Grammy in the Schools music education program. For more info, go to TicketsforCharity.com.