Lady Selling Lemonade on the Beach (reportedly clearing $1250.00 per day)
The Psychology of business is to "know what your customers want!"
This guy probably does not know what he is drinking, nor does he care... because he is after something more than sugared down lemon juice.
Reportedly for $10-USD a try, you get to see what's there when you finish sucking.
Now, that's marketing.... So who says making money is tough? The jobs are out there!!!