Instructables is pleased to present the first in a new series of Thursday Build Nights here at our San Francisco HQ!These are small-group sessions focused on specific projects - you MUST RSVP to attend, as we can only handle a certain number of participants. Registrations will be handled on a first-come basis. We're starting with a bit of craft/tech crossover, and plan to run sessions on a variety of topics.October 2: Intro to Chain Mail with SpiderOctober 23: Halloween open build night.See the descriptions below for details, including things to bring and/or materials fees. To sign up for one of the sessions, simply private message Christy with your name, email, and phone number. We hope to see you there!October 2: Beginning Chainmail with SpiderLimit: 10 participants (confirmed RSVP required)Materials Fee: $10 Start Time: 7pmProject is a European 4-in-1 chainmail bracelet. I'll teach 4-in-1 because it's the most widely useful chainmail weave. Students can use this same weave to make jewelry, armor, sculpture, lampshades, iPod cozies, etc... The materials fee is $10, which covers copper jump rings and clasp, plus the loan of appropriate pliers. I'll bring other goodies for people to look at, and I'm happy to answer any and all chainmail-ish questions.Additional kits and tools will be available for purchase after class.October 23: Halloween Costume & Decoration Open Build NightLimit: none, but please RSVPMaterials: Bring your own!Time: 6pm-9pmWe'll be working on our Halloween costumes and decorations -- bring your work-in-progress along and join the fun! We've got plenty of floor/table space, a couple of sewing machines and other useful tools, and enough skill and imagination to share. It's always easier to get excited about your project when you're working with a group. Please RSVP so we know how much snack food to acquire, and how much of the office to clean up. We'll kick you out at 9pm, or when the last Instructables staff member has to head home.