San Franciscans, and Americans, are generous folk. There’s been plenty of charitable giving and events for the people of Haiti all over the city — really too much to list. But I learned that La Boulange (2310 Polk St. at Green) is doing something special locally for earthquake relief, something that will mean more if you participate, so I wanted to share. The staff members from every La Boulange in the city have gratiously offered to donate all of the tips they make this Sunday, Jan. 31 to Doctors Without Borders in Haiti. The organization has been in Haiti for 19 years and already has roots established there, so it’s a smart choice. Better yet, La Boulange itself has decided to match all of the tips the staff earns on Sunday. So when you’re hankering for a fresh jus d’orange or some bread pudding after an indulgent Saturday night out this weekend, get your butt over to La Boulange and tip well.