I'm happy to join in for the p&s theme, but I'll use an slr in P mode to avoid buying more stuff. Namely, the program plus with either a FA 35/2 or FA43/2 lens, aperture rings set to A. Hope this fits
And just to suggest an alternative to p&s, how about a sunny 16 challenge (guess exposure)? If you only have cameras with a meter, just ignore it, decide on exposure before you look at the meter if the camera won't operate without batteries. What I posted in week 3 of March, I shot with sunny 16 and it's always rewarding to see that anything came out of it at all.