We fit out each seat with a facil recognition system that detects the smile, and proposes the following deal to spectators: "Entrance will be totally free. If the show produces no laugh, you don´t pay anything. However, if you laugh, you have to pay for each smile".

Each smile produced is worth 30 euro cents, something that in this day and age is quite a reasonable price.

And so that no-one would cry for having laughed more than they could afford, the maximum amount to pay was 80 laughs or 24 euros.

The average price of the tickets increases by 6 euros compared to traditional shows.

The systme was covered the main national media outlets. This produced more publicity, and this is turn produced 35% more spectators.

Each pay per laugh produced 7,200 euros of ticket money compared to 4,400 euros that was normally taken.

Currentaly the Pay Per Laugh system is being copied in other comedy theaters in Spain. A mobile phone app was created to use as a system of payment in other independent theatres.

The first comedy shows where you only pay for what you consume.