dim osprey
a wishing well outside of the restaurant, it only manages to work during night time at certain times. 
the wishing well would have small chances of giving you certain stuff for the price of 20 sushi rolls! it could contain a secret recipe that you have a small chance of receiving, such as mud cake. itd be similar to the AFK room but not at the same time, you can receive rewards but you 1. have to pay 2. itd definitely have a bigger chance considering that itd be there for a limited time.
it is also best if theres a cooldown!
the best stuff you could receive from the wishing well:
effect of like water dripping from you (if that doesnt exist yet?)
trick of a wishing star landing on the grill maybe..?
a uniform with like a water/wave pattern on it and the colour of it itself would be beige, the wave pattern would be dark blue.
a secret recipe (mud cake!!)
other stuff you could receive that arent as good and would probably have the highest % of receiving:
10 sushi rolls
15 points
5 sushi rolls
3 points
etc.
kindred siren
round hornet
icy drift