This page of the Saints Row guide describes the side activities from the Side Hustles category available in the East Marina district. Each of them has its own goals that must be met to receive the reward.
Reward: Depends on the rating.
You will find this quest in the western part of the location, near one of the roadside pizzeria. Your mission is to go to the place and rate the place. The lower the rating, the more opponents and the better the reward. You just need to protect your rating by eliminating the enemies and survivng. Afterwards, you will be rewarded with money and XP.