coffee and washing soda (sodium carbonate pH ~11, not sodium bicarbonate which is baking soda) does develop film. Not tried the orange juice thing.
You might have problems with the film sticking to itself with 35mm, or the paper in the case of 120 film. not really played with it, though. I've read of someone who ran a film through the washing machine, tried to get it processed, wouldn't let them, so they put some rice and the film in a sealed bag and left it (since rice absorbs moisture, like in salt shakers) and forgot about it and it grew all sorts of mould and it caused weird crazing on the film and strange colours.