I have always struggled with being discrete and being able to text or even call a potential companion. Recently someone told me to check out the textfree app for my phone. Works great and eliminates the need to get a burner phone.
You simply download the app and you get to pick your own phone number. It is free if you just want to text and don't mind seeing adds. However, you have to use it at least once every 30 days or you will lose your number. If you want to always keep that number, you can pay $4.99/month to reserve it, but I can't see me not using it at least once monthly, so for me it is free. You can also make calls for a price. Didn't check into that much.
You guys may already be clued in to apps like this but it was news to me, so hope this helps someone else