Hi Buzybee, it seems most of my friends met their other halves through friends of friends rather than through the nightclub scene (which seems to often lead to a lot of fleeting connections IYKWIM rather than a long term relationship). OK I'm going waay off topic here but sure anyway -
In short, oftentimes they found a lot of common ground with a particular person in extended circles of friends and acquaintances - not through blind date setups but through getting talking to someone they hadn't met before but was included in the general group night out or function or activity by virtue of being friends/colleagues with one person in the group, does that make sense? I don't know if I'm explaining myself properly

but I'd imagine the chances of finding someone you click with would be greater if they are friends with someone you yourself count as a friend purely because they would perhaps have similar interests or personalities?
Another thought that has struck me that may affect the age at which people choose to get married nowadays might be the fact that they are trying to save up for the wedding itself while paying off a mortgage or raising children, as they want the big white wedding and all the trappings - if we had wanted to go down that route we'd still be saving, instead we chose the small and simple option as we wanted to get married sooner rather than later.
One other thing - I think the idea of being proactive can sometimes work against the person doing it - I found myself, after coming out of a 5 year relationship at 21 (god when I look back now I must have been mad to get so involved so young!) that if I went out "looking" it would come off as obvious and put people off, but if you relax and just enjoy yourself without being out on the pull, that seems to be when "the one" happens along
anyway, sorry folks for the slightly off topic post, back on topic now - it is interesting to see the change in trends through the years - my grandparents for eg got married lateish - they were both hitting 30+, whereas my own parents generation seemed to get married younger - my parents were married at 20, and the swing seems to be back again towards the late 20s to mid 30s for tying the knot (I was 26).
Is it that in recent years it has become the norm to co-habit as it is now completely acceptable as opposed to co-habiting a few decades ago wher it would have been frowned severely upon, and people are now turning back to marriage once again as it's no longer "unfashionable" to go down the "traditional route" (sorry for the inverted commas, I am doing my best here to not suggest that either choice is more valid than the other).
Interesting topic!