reifman writes: San Francisco's gender imbalance is so bad that a startup recently proposed flying women in from New York City for dates. But, if you’re a straight male thinking of moving to Seattle to work in technology, think again. Seattle’s gender ratio is even more imbalanced and it’s about to get much worse for men. Amazon is building out enough space to employ 5% of the city population and its workforce is 75 percent male. By the end of 2014, Seattle will have 130 single men for every 100 single women.