Gender gap

On Wednesday evening, I was invited to attend another book club that was gathering to discuss my book.  I’ve always found these opportunities to be interesting and fun, but on the drive home, I realized something:

I’ve attended about half a dozen book clubs since SOMETHING MISSING was published in July, and I have yet to see a man at any of them. 

My own book club consists of three men and three women, but otherwise, I know no other man who participates in a book club.

What gives?