Monerica.com. Is a business directory of other businesses that accept Monero? A green checkmark means somebody has successfully used that business. A red X means that somebody tried and it was a scam.
Also, if you have a GitHub and use a business that has not been used before and has no checkmark or crossmark, then please tell them about it with your GitHub. And you can always use services to convert from Monero to Bitcoin if necessary such as Trocador.app.