I'd also recommend Mela, though biggest group I've been in there is four, so only talking food recommendation. Cafe Naz on Brick Lane has an upstairs room that they will use for large groups. Got to admit food has been hit and miss. Used to go there for the eat as much as you can buffet on weekday lunchtimes when I used to work at Aldgate, but went in groups to it a couple of times for leaving do's/birthdays. I've been in Cafe Spice Namaste in a biggish group (12) before and they seated us in the main area, though they might have a private room. Food was good, but as this was about 3 years ago the price would be a bit different. Dave