For a pocket gun, you've got loads of options.
Small j-frame revolvers in your size, weight, and caliber of choice.
Sub-compacts like the glock 26, kahr pm9, etc
My least favorite, but still possible... small 380s such as Kel-Tec P3at. (I prefer my guns to be 9 or bigger, though modern .380 ammo is relatively decent).
I'd suggest renting as many small revolvers and sub-compacts as possible. Tiny guns are hard to shoot. They're even harder to shoot if you hate the way it feels, handles, etc.