[RKDinOKC]

If they are mexican construction workers, just don't offer them any beer or alcohol even if it is just a congratulatory sip. That will kick off the party, and then you won't see them for two weeks. That's what happened when my nephew was so happy the crew working on his house was a week ahead of schedule. He gave them each a cigar and a shot of really smooth whiskey to thank them. After the cigar was gone they disappeared for two weeks.