I met my DH through a place called SPICE (spiceuk.com). It was started about 40 years ago by a man who had just moved to another part of the country and wanted to have a go at some social events. He found out he could get discounts if he got a group together, but didn't know anyone, so advertised. He realised that there was a gap in the market for people moving around or who wanted to try different events with like minded people but didn't know someone to go with.
You pay a membership fee, then pay per event in your area. The social, pub, meet ups are always free to attend though and newbies are encouraged to meet existing members there before making their mind up to join.
The nice thing is that you meet people (potential partners but friends too) who like the same thing - if you go on a walking weekend you'll meet fellow walkers, if you go to a jazz and dinner evening you'll obviously find people who enjoy jazz! I went to events like a tapas evening, centreparcs weekend, chocolate making days, curry making, wine tasting, quizzes, theatre visits. My SIL joined her one in another part of the country on our recommendation and learned she was good at golf so now plays with a new group of friends she made 10 years ago!
Two of the people we met at SPICE became godparents to our DS when he was born, eight attended our wedding. We've been to two weddings, apart from ours, of people who met through SPICE and four other couples we know met there.
They're not a dating agency. They will categorically say they are not there for people to find a partner/husband/wife. They are there to allow new friendships to start, allow people new to areas to try stuff out. But, of course, as I've said, if you're constantly going to meals with them because you enjoy that sort of thing, you'll bump into some people a lot of the time. Sometimes that can open a relationship or, at the worst, you make a friend who invites you to their NYE party or whatever and meet more people. It just opens doors without the feeling of having to try too hard.