Ok, I will give you a few more details and see if you still feel the same way.....
The effect this man was after was the polar opposite of some of the first dance videos you may have seen. The ones where the dance starts off like normal but then the DJ scratches the song like he made a mistake or equip malfunction then the B&G break into a dance routine. That is what he wanted me to do for what he called "shock". Sorry but I won't purposely make myself look like I made a mistake or draw attention to us.
This is a VERY affluent and wealthy family in our area. So much so that the field where the Wright Bros perfected flight was named after them along with a dam and several other local landmarks. This family has serious money.
I can only assume that if the guests knew what this man wanted me to do, there would be 3 others offer me twice that amount NOT to do it. As far as some saying "split it with the B&G", $500 would have been an insult to them for disrupting the flow of their reception. People of this type of wealth and power don't appreciate games and you don't mess with them just because you can.
Now with that being said, there were approx. 180 guests in attendance, most being single UD college students. When he ask me to do this, there must have been 75-80 on the dance floor. If I do a good job, I can count on 3-5 reception bookings at some time from this one reception. If I only book one, I am still money ahead (yes, I charge more than he offered.) If I took the money and it was not well excepted by the majority, I loose those bookings and possibly the venue.
When the reception ended, I told the groom what had happened and he thanked me for the way we handled the situation.
I can't say that no amount of money is worth risking my reputation as a wedding professional or even compromising my integrity. If he would have offered $1001 it may be a whole different story but I did what I thought was right for me, my wife and our business. We will profit more from it in the future than we would have gained there.
If you are a wedding professional, please think about all the repercussions before you do something and perhaps it may help you someday.