A decade ago, Eve Bridburg started Grub Street, Inc., Boston's independent writing center. Eight thousand students later, Grub celebrates it's 10th anniversary tonight on Boston Common, across the street from Grub headquarters at 160 Boylston Street. Festivities start at 4 pm and go, according to the web site, "late, baby, late." Beer, barbecue, readings from the spanking new and deliciously varied Grub anthology Hacks, and general word-related revelry to ensue. Happy Birthday, Grub.