1 Get a face tattoo (a fake one) preferably something like The Hakenkreuz (the swastiska as hitler used it or something else racist)
2 Say inappropriate things. Like if there's a picture of her/his man/wife on the table say. "Your wife/husband is very beautiful, i'd do her/him." You could also take that to another level and say that about a picture of their kids.
3 Wear something crazy.. Look at Bruno, Lady Gaga for inspiration and.. well.. I really hate to even name the greatest artist there ever was in the same sentence as those people.. But Michael Jackson wore rediculous stuff on stage lol.
4 If it's a women, stare at their boobs. They like that. When she notices and tells you. Then make an inappropriate comment like "They look really nice and big. I'd like to stick my Head(or your other head) inbetween tem" LOL.. i can't believe i actualy wrote that

And continue to stare at her boobs ofcourse.
5 Compliment her/him on their looks. Do it alot and in a creepy way and voice. And the situation will become extremely awkward.
6 Tell them you like to gamble at the casino. And do drugs and drink.
7 Another thing that might work is just to keep changing the subject. That will probably annoy them. Like keep asking them questsions about if they have kids or are married. How they are doing. What car they drive. Till they get really annoyed. If they are married you might also want to throw in a comment like "Are you still getting some now that your married?"
8 Try not to get arrested for your pedophile/sexist/racist comments.