Think Tank

• ENDING RACISM In this long-running series, attendees discuss how to take steps toward ending racism in Philadelphia and beyond, Sun, Aug. 9, 12:30pm, FREE , Unitarian Society of Germantown, 6511 Lincoln Dr., 215-567-0670.
• GREEN DRINKS Discuss the environment over drinks. Every first Wed, 7-9pm, FREE , Earth, Bread & Brewery, 7136 Germantown Ave., 215-242-6666.
• HIVE76 OPEN HOURS At this weekly open house, hackers and tech geeks can take a tour, meet Hive76 members and work on various projects, Wed, Aug. 12, 7-10pm, FREE , Hive 76, 915 Spring Garden St., Suite 500, hive76.org.
• IRISH REBEL HISTORY Irish history enthusiast James Generic will lecture on Irish resistance to colonial rule throughout the past 900 years, Thu, Aug. 13, 7pm, $5, Wooden Shoe Books, 508 S. 5th St., 215-419-0999.
• NAGASAKI DAY PEACE DEDICATION This dedication to people who were killed in the horrific bombing will include song, a candlelight ceremony, and an exhibit of the event's aftermath, Sun, Aug. 9, 7:30pm, FREE , Cathedral S.S Peter & Paul Rectory, 18th St. & Ben Franklin Parkway, 215-587-3839.
• OPEN HACK! Bring your projects in fabrics, electronics, food, music or other fields at this networking event for DIY-minded folk, Sat, Aug. 8, 1-6pm, The Hacktory, 1524 Brandywine St., 215-564-6686.
• A PEOPLE'S HISTORY OF THE UNITED STATES Learn about everything that your high school history teacher failed to mention, like the truth about Christopher Columbus and the War on Terror. Every first Thu, 7:30pm, FREE , Philadelphia Ethical Society, 1906 Rittenhouse Square, 215-735-3456.
• A VEGETABLE garden PARTY Disgusted by the American food industry after watching "Food, Inc."? This event will explore food's origins, modern ecology and urban gardening. And, of course, there'll be veggies to snack on, Fri, Aug. 7, noon-4pm, National Constitution Center, 525 Arch St., 215-409-6600.
• WOODSTOCK REVISITED In commemoration of the festival's 40th anniversary, attendees can talk with people who actually went to the festival (in '69, not '99) — to either reminisce or learn about a period they weren't around for, Wed, Aug. 12, 6-8 pm, FREE , Penn State Great Valley, 30 E. Swedesford Road, Malvern, 610-648-3219.