It should be noted that the chefs like to drink Hennesey. I think they just feel bad drinking it alone, so they give it to the customers that want to join them.
Taki is great not only for the food and the chefs, but also for the puns it provides. For example: what do my favorite sushi roll and youngest nephew have in common? They are both a little Rowey*.
*the fish eggs on top of this roll are called roe