Innovative concept, for Warsaw at least! Find the dodgiest looking building on ul.Piękna (ironically, it means Beautiful Street), subhead it a ‘Cartel’ for maximum effect, design a fantastic Posada, woodcut style ‘Day of the Dead’ take on Warsaw’s mermaid coat of arms symbol (which looks far better in its printed version, rather than the neon on the exterior wall), devise a splendid and exotic Mexican menu plus a brilliant drinks/cocktail list and watch the customers flood into this brilliant mini-establishment. Far more like 'Cheers' than 'The Titty Twister' from Robert Rodriquez’ Mexican vampire flick ‘From Dusk till Dawn’. Te quiero La Sirena!