I'm not sure about a license, I guess the company has to get some kind of certificate. Is there a cow-physiotherapy/massage-course somewhere? ;-)
I knew allready of the professional mourners for a long time, because we had someone on TV that went to the US to do this to show it exists.
Pick-up artists (see below) don't give the best pick-up-line, they give advice about how to be more confident and happy with yourself. Which in the end is the best thing there is: love yourself first, so you can love others.
I never knew about professional mourners until I stumbled across an article on the internet. One of the best reporters on counter cultures is Luis Thoreaux on BBC. He had a weird weekends series, where he spent time as a professional wrestler, spent some time in the Westborough Baptist Church, participated in a Demolition Derby and so on. I wish he would revive that series and jump into some current counter cultures.