Is it OK to refuse to serve same-sex couples based on religious beliefs?

Do you think that it's O. K. for religious citizens to deny serving couples of the same sex? Omit all personal prejudices and take into account that it's solely based on their freedom of religion. Wouldn't it be an infringement on their religious freedom to prohibit such actions? Or do you feel it's merely an attack on LGBTQ equality?
Is it OK to refuse to serve same-sex couples based on religious beliefs?
Is it OK to refuse to serve same-sex couples based on religious beliefs?
Is it OK to refuse to serve same-sex couples based on religious beliefs?
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