Brilliant Idea #79 is to disrupt that coffee shop / stall by giving away coffee for free, but ask them to pay to be entertained my a busker.
Essential to this is a trolley / mobile stall / auto-rikshaw that has doubles as a coffee vending machine and a stage / performance area with amplification and even lights.
The gamble is that the cost of the coffee given away counterbalances the benefits which I believe are;
– customers are intrigued and disarmed by the offer of free coffee
– more people will pay more money for the entertainment from the street performer