Some explanations for the non francophones :

First the sign on the right top of the shop which sells material for electronic cigarettes is a pun : "cigarette" does not need a translation ; "arrête" means «stopping». Incentive to the smokers to stop cigarette and to adopt e-cigarette.
But, more important, the portrait underneath represents Serge Gainsbourg (1928-1991), a brilliant and famous songwriter with a very controversial private life, heavy Whisky’s drinker and hard smoker of Gitanes !

Singer-songwriter, pianist, painter, scriptwriter, director, writer, actor and film-maker, great provocator too, Serge Gainsbourg met through his songs a huge success in France. Husband of singer and British actress Jane Birkin, he had love affairs with the most beautiful French actresses (Brigitte Bardot for instance).

(For those who want to discover the work of Serge Gainsbourg. I recommmend to listen first to «l’histoire de Melody Nelson»).