Go to the one on Delridge, 5405 Delridge, where there’s an “open house” till 7 but the box is outside so you can use it (no stamp required IF you use a dropbox) till 8 pm.
P.S. Approve Ref 71 plans to stream video from its event tonight – we’ll have a link from the home page, embedded if available, but here’s the direct:
http://www.ustream.tv/channel/election-night-with-approve-71