The layoffs come three weeks after some of the sub shop's employees protested for better wages and benefits. BY MEG GRAHAM A River North sandwich shop gave its employees an unwelcome Christmas surprise on Sunday night, firing them all by email. The 20 employees of Snarf’s Sub Shop at 600 W. Chicago Ave. received the email last night around 5 p.m. Grid obtained it this morning. It reads as follows. 1. Due to increased competition and losses, ownership has decided to consider remodeling and reconcepting the store at 600 West Chicago Ave. 2. The store is closing, effective tomorrow, December...