I'm also looking for a pocketable film camera.
Previously had an Olympus MJU II which is outstanding, but it bothered me that it makes noises when I switch it on and it advances the film. Plus, you have to disable the flash before you shoot because the default mode is auto. I also didn't like that it spools the film leader into the cartridge when rewinding. Plus, every time you think about taking a picture, you have to turn it on, then a motor moves the lens, which is noisy and drains the battery -- even if you end up not taking a picture.
The best pocketable film camera I have ever used was a Minox 35. Totally love it! There are several models, most of them outstanding, especially the later models with the multi-coated lens. Tiny camera and total stealth because it makes zero noise. Battery lasts forever. But the problem is reliability: I had to buy 10 of them (all advertised as "mint") until I found one that actually worked. Then I bought one that partially worked (light meter was hit & miss), but a few weeks later that one crapped out as well, another $100 down the drain.
What about the Fuji Klasse W? 24mm f/1.9 (!) lens -- amazing! Has anyone tried it?