We used to attend a BBC party at a swinger club in another town. They gave black men free entry one Friday each quarter. January, April, July, and October. Couples paid a regular entry fee at the door. They had a large group room in the play area with beds surrounding three of the walls, and the women would lay on the beds, and the black men could go from bed to bed as they pleased. The room was open to females and black men only from opening at 8 PM and Midnight and then anyone could enter.
The event normally attracted 25-30 white women and 120+ black men, so the average ratio was five to six men to each lady. The club was located up North in Ohio, so one January when we went, they had a very heavy snow that kept many of the couples away. We were in a hotel nearby and most of the men showed up. I think that night there were four of us ladies and over 80 men. More than I could handle, and unfortunately, some of the guys were left to jack off while watching. I felt bad for them but could not do anymore.
Sadly the club closed in 2018 and never reopened. Those were always very fun parties.