As a single 25 year old male, I agree with you on the point that it's much harder to meet women after you finish college.
I rarely see any women within the age range of 21-30, of whom is single and or willing to date. The only time that this occurs is when I'm jogging on a nearby trail, or when I attend the Christian Singles Praise & Worship, of which I have spoken.
There are a few single women at my church, but they rarely seem interested. I had one girl at my church, of whom I really liked (for years), and she would play games with my head and tease me (get me to think that she liked me in a dating sense) so that I would later ask her out. Upon doing that, she'd say something to the effect of, "As friends, or...", or she'd make up an excuse of always being busy.
I had a conversation with a guy from Korea who was in an arranged marriage ---he had pictures of himself and his wife when they were 2 years old when the arrangement was made by their parents. He defended family arranged marriages because marriage isn't about infatuation or romance but providing a family for children. He made good points --that parents will be very careful about the background of someone they choose for their children, they choose within their own social circle and so the spouses will be raised with similar values. He said they have a much lower divorce rate than Americans who basically marry strangers they meet and think they fell in love with, our marriages are based on looks and whatever else but family arranged marriages are based on more solid grounds.