Win some... lose even more
I have been going to Hollywood for about a year during which time I hit a nickel slot for slightly over 10K. I also have had as many as 25 slot machine jackpots worth on average between $1500 to $2500. I have certainly noticed more wins by not using the players club card, after all those losses do contribute to the "free" comps. Since no cards mean the potential to get a patron to sign up for a card the more win without one.
Whenever I go now I use the card at times, if a machine is stone cold with the card. I cash out, pull the card and continue on the same machine and usually win back what I lost plus more.