Pao de Azucar, 57 Union Square, will be opening a lunch-time centered buffet in a few weeks. Right now the place has a butcher counter and rows of market offerings from perfume and CDs to manioc flour and condensed milk, but the steam tables are set up and the hot food should start in a few weeks. The intention is eventually to offer grilled meats as well, but that won't happen immediately. The initial per pound price will be low, about $3.50, but once started it will go up to about $4.50. The number is 617-635-0022.