(Singlism, broadly defined as discrimination against the singles, is not to be confused with Singlish.)
For those who think that marriage is ontologically superior than singleness, could you defend your argument Christologically? No Adam and Eve, please. To say that humans are created in pairs and use that as a basis of ontological superiority of marriage comes not from the Bible but from the Koran (QS 36.36). Seriously, it is tragic to imagine that Jesus and Paul might be rejected if they applied for the pastorate in those churches.
Reality check: I suspect many of us still harbor the unchecked assumption that, to use Facebook terms, “In a relationship” is better than “Single.” I do not want to sound like as a jerk, though, since you could retort back that saying good things about singleness is easy if you are not one. Nevertheless, on the other hand, if you say good things about singleness when you are single, you will be accused of self-justification or self-consolation! I guess the lose-lose situation in itself perhaps indicates the pervasive bias against singleness. And we must name evil when we see one. I know it is hard to escape the societal stigma, but it does not help if the church actually perpetuates this structural sin.
(On the other hand, to be fair, those who argue for a place for singleness in Christian life must provide their Christological argument as well! Or, better, I guess Paul would put it this way: There is neither married nor single, for you are all one in Christ Jesus!)