We were honored to have Spanker Bryan and Anisa (who also goes by Ann) in attendance. If you haven’t checked out Spanker Bryan’s excellent blog, it is at http://spkrbryan.blogspot.com/ . Anisa went from lap to lap; no matter how hard and how often she was spanked, she came up with a smile and wanted more. Here are some photos of just one of the times Bryan took Anisa over his lap.
After the party, Julie commented that there was less evident sensuality than she had expected; for her, spanking is more about eroticism than it is about punishment.
Part of the explanation is that while there were several couples in attendance, most of the spankings were between people who were merely friends and sometimes new acquaintances. These are not usually going to be explicitly erotic.
If I wanted to emphasize erotic spanking I’d limit the group to couples, have softer lights and encourage people to use the back rooms more. The back rooms are an option now, of course, but to the extent that these are folks that do not know each other well, it’s not likely to get very sexual. That’s almost exclusively an established couples thing.
Nonetheless, I believe that most of the people present found participating in these spankings stimulating to at least some degree. Spanker Bryan and Anisa provide a good example:

Anisa over Bryan's lap.

Let's get those panties down.

He's just using his hand, but it smarts!

Let's see how your bottom is doing . . .

“You are sopping wet! I think you’re getting turned on by this spanking.”
“Yes, I am.”

"Guess I'll have to spank you some more."

A nice hug afterward.