This fall’s forecast: brand expansion, as three enterprising outfits infiltrate new neighborhoods during Labor Day week. Mexicue brings Mexican barbecue to the Lower East Side (106 Forsyth St., nr. Broome St.; 646-559-4100), and Asian barbecue arrives in the south Village courtesy of Williamsburg’s Fatty ’Cue (50 Carmine St., nr. Bedford St.; 212-929-5050). Up in Murray Hill, Terroir wine bar takes inspiration from the immediate vicinity, augmenting its Italian offerings with fried-oyster sliders (pictured) and a French dipitems that might have appeared on a local menu long ago (439 Third Ave., nr. 30th St.; no phone).