what clubs to go to meet bulls

Yes. Most all Swinger Clubs allow single men certain nights Wed, Thursday Friday usually. Saturday nights are typically couples only. On a couples only night you might find a husband eager to fuck your wife while his wife is off playing with another woman or couple. SLS dot com and SDC dot com are swinger sites that have exhaustive listings of on premise swinger clubs all over the world.
Hotwives and cuckolding to me are just subcategories of the Swinging Lifestyle. So why not join the fun?