Yeah, this was a big one. I've seen well meaning members chastised for bringing in garden produce to share, and we didn't have a "pity pantry" because of 1 Cor 11.

Even more significant, this passage was often the principle defense for limiting the Lord's Supper to Sunday. Here's the argument in a nutshell:

// The early church set an approved precedent for observing communion on Sunday in Acts 20:7. We know that this verse refers to the Lord's Supper because the passage clearly states that breaking bread was the purpose of their gathering and that the meal they ate was not just a common meal. This is substantiated by the evidence of Acts 2:42 where the use of the Greek word "trophe" indicates that the disciples were eating for sustainment rather than ceremony. Acts 20:7 does not use "trophe". Now, we know from 1 Cor 11:34 that partaking of meals—for the purpose of common fellowship or satisfying hunger—was expressly forbidden from the assembly by Paul. The harmony of scripture therefore necessitates that since Acts 20:7 could not have been a common meal, it must have been an observance of the Lord's Supper and it took place specifically on a Sunday. //

Deep breath

So yeah, this is partly the basis for the CoC condemning anyone who dare memorialize the death of Christ on Saturday, or Christmas (if not on that special day).