Hotels in Seattle are already charging two to three times their normal rates for World Cup match windows. If you have friends or family visiting Seattle this summer and need accommodation advice, the sooner the better is the only honest thing I can tell you. One regional economist offered a durable rule of thumb: take whatever number the promoter gives you, move the decimal point one place to the left, and you have a reasonable approximation of the real impact. What is not debatable: Seattle Center, the waterfront, Pioneer Square, the CID, and SoDo are going to be packed with international visitors for a month this summer. For local businesses, residents, and property owners near those corridors, that is real and it is arriving in about 90 days.