We got married about 10 years ago in a registry office, we lived in London but chose a place near our home town instead as that is where most of our friends and family lived so made it easier for people to attend (also happened to be the 'same' registry office my parents got married in, except it had been torn down and rebuilt sometime in between).
Sent about 60 invites overall, only about 30 people turned up and of that maybe 20 at the registry office. I had a white and purple medieval style wedding dress that my sisters bought me off ebay for about £80 (they wanted me in something with at least some white/more traditional looking but also wanted to get me something that was more to my tastes and cheap was also fine by me). Had 1 bridesmaid who wore a very colourful dress which we found in Camden market, husband wore a very nice long decorative/embroidered black jacket/coat, top hat and snake cane (coat found in Camden Market but sourced cheaper online).
The registry office was very tidy looking, red brick and white door out the front, nice enough for a couple 'before' photos, tidy white room with a nice wooden table to sit at and sign the registry after, nice wooden cushioned chairs for friends and family to sit on. My mum got a ribbon to put on her car (she drove me to the office), bought me a bouquet of flowers (purple themed) whish she later put on my dads grave for me, baked and decorated my cake (she used to bake, decorate and sell wedding cakes as a side job) and walked me down the 'aisle' in place of my dad.
After the wedding there was a fairly nice little area right outside, with a corner/triangle shaped wooden gazebo and plenty of green foliage to take some nice photos of us and group photos, one of my sisters was our photographer (we were aiming to do it cheap, didn't have much spare cash for it). We aren't religious either, so a church would have been weird, however we followed it up with a handfasting in a field which more of our friends and family attended (roughly 30 as mentioned above), I had a change of dress to something more 'pagan', we got everyone to tie a ribbon around out hands (and kept them all), set up a simple flower arch for the ceremony, had cream tea available for all the guests and some bubbly for the toasts my mum bought at the supermarket plus a bar she hired for people to buy their own drinks too, a DJ friend of my sisters to play music and people were free to camp the night if they desired. We spent the first night in a tent ourselves, then rushed back to London the next day to get ready for our honeymoon in Greece.