Cadbury's, before being taken over by Krafts had an exemplary record regarding its businness practices and its treatment of its employees. This is because it was run according to Christian Quaker principles. So there's an example for you.

Thats slightly different, what we are discussing is refusing service for religious reasons, doing good works is a different discussion. Unless part of cadburys good work for example was to refuse to sell someone greedy more choclate bars, which seems unlikely given wholesale ect. Or perhaps they refused business deals with greedy bisnuesses ? (although they sold to Krafts in the end which probably as a business is always looking to get more money, as they should in a capitalist system)

I wouldn't doubt that there are examples but I think they probably get targeted more often as a cover for some people's prejudice's. On the counsellor surely they shoud be expected to counsel couples, not pick and choose what is acceptable, are they allowed to refuse service to those with a huge age gap (because thats kind of wrong) ?