The people in the restaurant had their hearts pounding like thunder, terrified that zombies might burst in through the door. The male protagonist noticed that the restaurant's bar seemed very sturdy and called over a few strong men to help move it behind the door, making everyone feel a bit more secure.
Of course, staying in the restaurant was just a temporary measure; the best plan was to leave the ship. Jumping off the cruise ship should enable them to escape the zombies. However, this restaurant had no windows; it was a windowless dining area, which was a problem. If it had been a regular restaurant with windows, they could have pried the glass open and jumped into the river. That would be safer than staying in this dangerous restaurant, even if they had to float on the sea's surface.
