I have thought about this conundrum before and the only solution I see is to make the damn women's bathroom bigger!! I'm a guy but I have been in women's restrooms before (don't ask, but alcohol was involved) and usually they are exactly the same size as the men's but have fewer toilets. THis makes sense....women take longer so we'll give them fewer...Hmmm...I don't think this will really cause any bottlenecks though. I say make the women's bathroom at least three times the size of the men's an the problem will go away.