I went to a funeral service held by Christadelphians about 5 years ago. It was held at a U.K. state crematorium. There was a jw link which probably bears explaining.
A "sister" in a nearby hall aged about 70 had her mother (a Christadelphian) pass away (aged early 90's) and she phoned me wanting to ask about "handling the funeral" - she was the only surviving child and the arrangements fell to her. I asked her if her mother had left any instructions which she had and so I said she should follow the instructions.
Anyway she did and the resulting Christadelphian funeral followed. Of course the sister hoped that her jw friends might support her at the funeral and out of a congregation of 70 or so in the end a handful of us ( non hard line jw's) went (plus me from a different hall) and determined to sit in the back rows.
However the whole Christadelphian congregation besides we jw's was about 25 and as the place seated a 100 or so we moved forward a bit so as to not create a gap.
The talk was very similar to a jw one but without the "infomercial" and a much bigger family history/life of the deceased content which was nice. But the demographic described by SBF was evident.
All the men (including the speaker) were dressed in jackets and trousers with ties. A bit shabby like an old British schoolteacher and none had a matching colour suit-jacket so a bit like a "rebellious" jw might wear if he knows he is not "on the platform". The women were all a little dowdy and frumpy by even jw standards.
I would say that it was 40% men and 60% women and the men were 50's through 80's and the women 60's through 80's except one younger couple in their 30's who were also dressed a bit frumpy and "schoolteacher-ey". All were "white".
After a service in the UK the congregation files out of the crematorium and typically goes to console the bereaved and look at the "flowers" which is an area about 30 yards from the hall on some hard standing.
The Christadelphians were reserved but friendly and we jw's probably seemed similar to them.