A table hopping magician might benefit from this:

On your website have an interactive mind reading trick or a video that
explains something. The audience always asks “How do you do that?”
The magician responds by “Well here is my card – I explain you a thing
or two at my website” At the end of the gig pretty much everybody that
attended this party will walk away with his business card and many
people will visit his website. When they sign up for the mailing list
they get access to some easy magic tricks. Whenever any of his
audience members has a party themselves – good chance the will contact
him. So instead of a room full of audience members there will be a
room full of prospects that he is exposing himself to.