I should clarify by explaining that Willi's Wine Bar, the pioneering Paris wine destination founded in 1980 by British expat Mark Williamson, is only hidden to people like me. For the past four years I've worked a few blocks away from the bar, and until the other week, I'd never been tempted to step inside.
I am, it turns out unreasonably, disinclined towards restaurants known for tote bags and wine-art posters. The children's-book storefront font alone is enough to turn stomachs. Willi's, from the outside, appears to be a wine bar for people who only drink wine when they visit Paris.
Actually, it looks a lot that way from the inside as well. Williamson's decades-long indifference to cool is reflected in the clientele, which I'd wager consists primarily of Paris' least-informed Anglophone tourists and expats, family vacations and business trips whose organisers may have breezed, once, through a Lonely Planet guide from 1997. So upon finally dining at Willi's the other night, I was fairly gobsmacked to discover that Willi's' regulars are, if anything, more informed than me. All this time they've been enjoying, in a friendly, unfussy environment, Paris' greatest Rhône list.