Greg McKeown, author of the book Essentialism: The Disciplined Pursuit of Less has developed a repertoire of eight different “No” responses.
You can listen for free to this chapter in the book here: https://tim.blog/2018/07/19/essentialism/. Start listening from 5:58 to miss the sponsorship ads at the beginning.
And then if you want the eight ways all written out for you, here they are: https://fs.blog/2014/11/eight-ways-to-say-no/
Jia Jang set out to be rejected 100 times. Here’s his TEDx talk:
Finding Events to practice Undercover Speaking
Meetup provides a way of meeting up with other people interested in similar things. There’s over 100 meetups a month in my small city of Wellington, New Zealand.
Eventbrite is a listing site for events where you can find a variety of different functions to go to.