I think they were blameless, but not sinless. If they were sinless the greek word "anamartetos", which means "without sin" would have been used. Instead the greek word "amemptos" was used, which indicates that they were something less than sinless... :-)
The pastor started by reading the appropriate verses in the New Testament that describe the events of the last supper. Everyone had brought a small wash basin and towel with them and we split up into two groups, male and female. The males went to one section of the building and the females to another. We filled our basin s with (warm) water and then split into pairs and washed each others feet, a practice that Christ instructs all his disciples to perform on each other:
Joh 13:14 If then I, the Lord and the Teacher, have washed your feet, you also ought to wash one another's feet.
Joh 13:15 For I have given you an example, that you should do as I have done to you.
I have to say that this is a very humbling, but holy experience. One can't be proudful or arrogant and do this...which of course was probably part of the intent.
After this we returned to the pews. One of the elders took a piece of unleavened bread and broke it into small pieces, thus equating it with the broken and battered body of Christ on the cross.
Luke 22:19 And He took bread and gave thanks, and He broke it and gave it to them, saying, This is My body which is given for you, this do in remembrance of Me.
The piece of bread were then passed among the congregation and we each ate a small piece.
Next tiny glasses of wine were passed out to the congregation. We each drank, remembering the words of Christ:
1Co 11:25 In the same way He took the cup also, after supping, saying, "This cup is the New Covenant in My blood; as often as you drink it, do this in remembrance of Me."
All in all it was very moving experience that I wished to share with you all.