There are Absolutely No Rules in a street fight. If you are fighting for your life, then by any means necessary stop that fight. But if your just in a brawl/scuffle, then you arent going to stab a man for some shitty agrument. Yea beat his ass, I favore grabbing the wind pipe when choking one handed. Break his arm, lift the head a little so it bounces with every punch. But unless you fear for your life, leave the beer bottle on the table.
And better yet knock out the big fucker he came with first. That will stop any one else fromm jumping in