I'm not an authority on bars or brothels, but I'd say that a "charm charge" is a cover charge and that the "Soap Sharuwei" sign is for a Soapland, the soapy Japanese brothels. Here's a review of that particular (chain of?) Soapland with creepy methodical entries like "Was there a kiss? No." and "Were sanitary implements used? Yes."
-- (November 28, 2004) on Japan