The old-fashioned method you are suggesting requires much more effort than Silicon Valley parties that are currently being thrown. Changing who you are as a person is tough, and why do that when there are easier options. In places like SV and Seattle where there is an imbalance between men/women, you could follow these instructions perfectly but you would still be playing with bad odds.

There was recently an article about a prostitution ring busted in Seattle involving Amazon/Microsoft employees, which just shows these type of situations are inevitable in male-dominated industries, and wealth just exasperates the issue.

The old-fashioned method is one of those win-win situations, but if you're willing to let go of being morally correct, it certainly does not hold up against what is currently going on.