Unless the information is incorrect or outdated, I'm seeing right now in the Free Gambling Lessons link on this website (this is within the "Useful Info" section of the Casino Gaming link) that several casinos (Boulder Station, the D, Excalibur, Golden Nugget, Hooters, Mandalay Bay, Mirage, Monte Carlo, Plaza, Rio and Stratosphere) at least at times if not on a set schedule have classes on at least Texas Hold'Em.
RecVPPlayer
RecVPPlayer