I'm going to make racist jokes
Why would you make such jokes?
It's just for fun, and I want to elicit a good response from people
Regardless of the spirit, you shouldn't tell those kinds of jokes.  They can perpetuate stereotypes and lead to others feeling bad about themselves.
It won't affect people.
You don't know that it won't affect people. It's just wrong to make racist jokes in any situation and you shouldn't do it.