Local chapters can request a portion of the leftover seeds, once the surplus round is finished. Our Chapter does it and you never know what you might get, but there are always a good number of real gems if you know what to look for. When we get our portion, someone always takes time to sort them alphabetically and we keep bunches rubberbanded together. This way, when the tray of seeds is "mobbed" by hopeful members, it stays sorted: someone pics up a banded bunch, looks through it, rebands it if he takes the band off and then puts it back.
This is great fun, and a perfect way to spur good conversation about plants. Both new and experienced members participate in the free for all, and its a good time to ask questions like "which ones of these are easy to start?".