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A researcher wants to examine drinking patterns in men and women in bars in New York State

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A researcher wants to examine drinking patterns in men and women in bars in New York State. She randomly selects five bars and then randomly selects subjects at those bars to complete her surveys on four randomly selected weekends. However, she did not realize that two of the five bars selected were for gay men, and another bar was having a draft special for the football playoff games for three of the four weekends. Her sample ends up being 85% male, but the population who attends bars is only 65% male. Is this sample representative? Why or why not? Would this be an example of sample error or sample bias? Should the researcher be concerned?