Had forgotten about this until last night late. Back in June, my brother, his wife, my wife, my son and I were in Vegas for a week. My brother's wife loves 3-card poker and was playing at the table adjacent to the table I was playing BJ on. My brother decided to stop on BJ and move over to the 3-card poker table for a while when a seat opened up. His wife was at what we would call 1st base in BJ, he was closer to 3rd base but not on it. After a few hands, the person on his right got up and left. After a few hands where he took a beating, the guy to his left said "these cards here suck, I'm moving" and he moved around to the right-side of my brother. Got a straight flush (40-1 payoff I think). Had he stayed where he was, that would have gone to my brother (this was using one of the auto-shuffler/auto-dealer machines that spits out 3 card hards 3 cards at a time... He then said "well, no more good hands here so he got back up and moved back to where he was. Got 3 kings. That would have gone to my brother had the guy stayed still.
Fast forward to the Beau in September when we all went down there together. We were (I was, he was watching) playing 2d BJ and doing OK, but we had this ploppy ($25 table) that was playing beyond slow. Each card he would stop, think, look at his BS card, think some more and finally indicate hit or stand or whatever. We were not playing 60 rounds an hour. My brother decided to help out, although he didn't know how much at the time. He sat down between me and the slow-ploppy-from-hell, and immediately got a BJ. Ploppy got pissed. He then said "hmm, no more good hands for this spot so he moved to the other side of the ploppy (btw the count was sky-high when he jumped in) and immediately got another BJ. The ploppy slowly turned beet-red, sputtered something I couldn't understand, and then left. My brother said "enough for me, thanks" took his $150 (he bet $50 on each hand) and left me to play heads up at probably 4-5 times the speed of what we were seeing with the ploppy playing. Now agreed this is not going to happen very often. But you do have a 1/4 chance of getting a better hand than the ploppy for two consecutive hands. That should be enough to spook 'im. :)
We developed the strategy of when someone is muttering about "the flow of the cards" when someone leaves or joins, I'll get my brother's attention and we run 'im off. :)
Both the dealer and I had a good laugh about the "stranger's" luck on drawing those two BJs and the ploppy looking like he was about to have a stroke his blood pressure was so high..
Another sort of "team" play. :)