Honestly, all the taxi drivers I have ever encountered in Poland will do exactly what you want (errand wise)- I wish I could export them to England as the bloody taxi drivers are horrible here !
Not always so my friend as i was a TAXI DRIVER myself for a long time, I would wait along time sometimes for people and when they got in, it would run me late for my next pick up, they would throw abuse at me and others, damage our vehicles, but as long as they had a good time well in there eyes "to hell with the rest"
Some days i would take people home for nothing as they had no money, only when they got to there destination would they say this. I have done shopping for them rushed one guy to hospital who who been glassed, to have a wet ridden £20 note shoved in my face, and DEMAND change.
Many a time my friend i have encountered women and men in such a state of drunkeness or crying through relationship breakdown in the early hours, out of my own pocket i have taken them home without pay, and when they got home just a slam of the door and not a thank you.