Probably better if the third card says, "
Their favourite curry"!
The Hindu (or Chinese) rice bowls spring to mind, but the normal method ones are a bit awkward to work with and probably not suitable for a party; you haven't really got that long to get up to speed.
Hindu Thread is another obvious one, and a bit more suited to the environment.
The Cups and Balls is quite a common street magician effect. You can get special Indian Cups (more shallow than regular ones, with little handles), but obviously you won't have time to master a different version between now and the weekend!
Other things that could easily be presented in a suitable fashion are the ashes on the palm trick (although I have a feeling this might have been exposed on some TV show, so be warned), travelling salt or water (from hand to hand) and maybe the old
Buddha Papers trick. There are probably a lot more, but you don't have long so unless you want to adapt more things you already know, you will have to keep it simple and really sell the tricks on presentation.