Here's how it would go down:
-Greedo would start the fight. He would first shoot Muftak in the head.
-Kabe, mad at Greedo, would pull out a pistol, aim for Greedo, but miss and hit Hammerhead in the heart, obviously killing him.
-Kabe, dissapointed at his terrible aiming, would then start firing at Greedo like crazy. He would successfully kill Greedo, yet keep firing until he destroyed practically everything behind the counter (drinks, machines, etc.)
-Wuher, mad at Kabe for destroying all that valuable junk, would pull out his huge gun that kind of resembles a gatling gun. He would continue to destroy everyone in the cantina except for Kabe, Djas Phur, Han, Chewie, and Hem Dazon.
-Djas Phur whipped out his two pistols, and shot right through Hem Dazon. He would then use the pistols to shoot Wuher exactly 7 times (now Wuher and Hem Dazon are clearly dead).
-Chewie would run over to Djas Phur and literally pull his head off of his body. (Now the only ones left are Kabe, Chewie, and Han)
-Kabe whipped out his pistol, and attempted to shoot Han in the leg, but Chewie tackled Kabe before he could even put his hand on the trigger. Then Chewie took his huge bow blaster and blasted right through the chest of Kabe. Chewie and Han are the only survivors...
Or ARE they?
-It turns out that the Tonnika sisters were actually alive! They were both standing outside while all of this was going on. So, while Chewie and Han were doing their little celebration dance, The two sisters each drew a pistol and shot Han in the chest simultaneously. Chewie was so enraged, that he stomped over to the sisters, grabbed them both by the head, and threw their heads together, virtually crushing their skulls.