More on Texas Hold 'em
I received a response from Norm Goldstein on Texas Hold 'em:
First, the full term, Texas Hold 'em, is the more common usage, including that of the World Series of Poker.I'm not sure I agree that 'em would be lowercase in any use. What about in a title? What about at the beginning of a sentence?
Also, the last word is a corruption of "them" and would be lowercase in any use (as in "sic 'em").
That argument makes sense to me if the words are forced together, as in Hold'em. But not when 'em stands alone.