ComBots Cup III, May 3-4, San Mateo Fairgrounds at the Maker Faire. Watch combat robots fight it out for the holy grail of gears. Open to robots from 30-340#. A total of 34 bots are already signed up. RoboExotica USA, May 10, San Francisco. Bring your roboartist or automated beer-dispenser and enjoy a a dash of art and a splash of spirits. RoboGames 2008, June 13-15, San Francisco. Don't miss the world's largest robot competition with over 70 different events hosting a wide range of robocreations made by hobbyists, students, and pros. 10+ events are designed to encourage young engineers under 18 with no registration fees. Gallery.