Get help. Especially if you are a member of a Church, sometimes they will at least give you grocery money. It doesn't cover rent, but it helps! Maybe you can do a gig for them in exchange?

Mooch. Call any friends, and invite yourself over to cook them dinner - the price? You get dinner too. Depending on the friend, this can be a one-time thing, or once a week. It works very well if you have any friends who are too busy with their job to cook, but sick of takeout and cans... and if you are a good cook.

Nothing wrong with mooching if they get something in exchange, like a good dinner, conversation, maybe some music afterwards...

It only works for short periods though, or they get sick of it.

Just make sure to pay them back if at all possible when you are back to normal earning capability.

(Unfortunately, I never really had normal earning capability, and many people got sick of me... but at least I'm still around, and getting stronger every day now.)

Food banks can sometimes help, too. At least they can free up the money that would be spent on food to go to other purposes, like rent, or promotion to get gigs.

Good luck!