I depends on how much you want to "impress" Don Corneo.
But you do need to get a dress before you can even go anywhere near the place. To get the dress you need to go to the tailor/dressmaker. He is on the third screen (I think) on the left hand side. You can choose what kind of dress you want to get.
You can also get a wig from somewhere... I think you get it by going to the gym and having a squats contest with one of the guys there.
BTW... did you see Cloud in the hot tub in Honeybee Manor!!! That was so hilarious!!!
Abe Babe...