You could simply let them know that you will accept it. They'll tell you if they're interested. Just suggest, don't attempt to convince. It may not be welcome.

You could simply let them know that you will accept it. They'll tell you if they're interested. Just suggest, don't attempt to convince. It may not be welcome. Payment methods would be either through a third party processor, or as a direct payment to an address. Making people change their way of doing things is hard. You will find it more rewarding to promote your business to people who already use bitcoins. You have an opportunity there to find new clients. However you do it, offering a discount at the start will help.