>> Private entities (individuals, companies, clubs, etc.) can refuse to participate in things they find objectionable (gay marriage, straight marriage, death penalty, life, whatever). There may be legal repercussions if, for instance, what they're refusing to do is to pay taxes, a legal obligation.

Not always, at least not in the UK: http://www.bbc.co.uk/news/uk-northern-ireland-32065233

Again, not commenting for or against. I just think that the philosophical arguments of where freedom of conscience butts up against other people's rights is an interesting topic.