When I met the client, I gave him a firm handshake and then patted his butt.
That could be a problem if he takes it wrong way.
I did that because several people told me that it's something I should do in that culture
Patting him on the butt could be construed as sexual harassment. Just because a lot of people say something doesn't always mean it's true.
I'm going to go with the crowd and do that.
You mean well when you want to follow the culture, but make sure that you are given the right information. You dont want to lose the client or even worse get into trouble.