We'll be in Paris in mid-May and would like to have a lunch on l'le St Louis. Mon Vieux Ami is on my radar and I would love to know if chowhounds would put it at the top of their lists. Also, would a guy without a jacket (dressy jeans, if that is not an oxymoron) feel comfortable? Other l'le suggestions also appreciated. We'll be in "town" for a couple of weeks. Thanks.