Great ideas here! Just a few thoughts:
-The star things are a good idea, but would be strange in the daytime (black sky in the daytime?). I suggest using this (
http://www.perpetualkid.com/index.asp?PageAction=VIEWPROD&ProdID=1959&dc=nextag0907 ) or something like it so you can switch it on and off in the day and in the night
- The T.V. is a good idea. It should be put in somewhere as a fake "window" to add realism.
-Put some fake (or real) palm trees in the corners of the store to hide the corners. If the corners showed, that would blow the whole beach illusion.
- For lighting, have some tiki torches inside the store using those fake fire lights
with the mini fans. That would be cool! At the tables put in those little light-up tea lights.
-As for the window, I have no idea. They could remove your diners from the relaxing beach feeling and ruin the mood. Tiki curtains? I don't know.
-Animatronic parrot at the reservation desk?
-For Holloween, you could have a full sized skeleton in swimming trunks holding a surfboard, some spooky video on the T.V., purple and green lighting, and here's a crazy idea: every hour on the hour starting at the time when you put the star lights on, you have a thunder sound effect play, a flash of lightning ( the dimming of the main lighting leaving only the tea lights on, then in the semi-darkness, have a strobe light flash), and (if the mall allows it) turn a smoke machine on for half a minute to get the real spooky effect!
- For Christmas (Holiday Time), string lights in the palm trees and put in some of those light-up palm trees and light-up flamingos to create a holiday feeling. If you really want to wow the customers, every hour on the hour say over a loudspeaker: "Attention: a snowstorm has changed courses and is now coming towards the beach! A snowstorm is coming toward the beach!". Then turn on a snow machine and: voila! instant snowstorm!
I hope that helped a little!