An alcohol wipe was left on my wooden dining room table. There is now a mark on the table... any ideas on how to fix it?

You can try rubbing mayonnaise on the stained area, but usually a combination of things work such as:
Fine grade steel wool dipped in paste wax
non gel toothpaste and baking soda
There is a new product I saw at LOWES the other day it was called RING AWAY, I am not sure how good it works though.  I have tried the things i suggested to you and they do work just remember don't use anything too abrasive and always rub WITH THE GRAIN.