It depends to much where the rogue is. You m9ight be in a poor section, a rich section, a religious section, etc. It also depends on what type of person you target. I play all that by ear and random dice.
Yes, playing by ear is fine. Usually. But I've come into a situation that would make life much easier if I had a percentile-based table. I remember there was a Dragon magazine article from way back that included such a thing. . . .