Halloween has been moved from the Castro to AT&T Park. *But with Halloween falling on Friday night, you know the Castro will be packed as the night progresses. It will be a festive weekend for sure!
http://sf.curbed.com/archives/2008/09/05/castro_castration_halloween_banished_to_att_park.php
http://sf.curbed.com/archives/2008/09/05/castro_castration_halloween_banished_to_att_park.php