Bay seniors have long suspected that Halloween has been stolen from children and expropriated by adults. Every bar in the Bay Area appears to be competing to come up with the most ghostly, ghastly theme. This year the Geezer gives the prize to Commodore Cruises. On Saturday, October 26 at Pier 40 you are invited aboard for a Titanic Masquerade Party. The 300 guests will come as long-dead, disintegrating passengers from the ill-fated liner. 4-hour cruise. Open Bar. $85-125. Here is an fuller list of scary soirees.