Darlin’, I understand that in YOUR experience, that has been the case, on Crystal and on other lines. In MY experience, NO Crystal cruise ever sailed without a bridge instructor in the a.m. on sea days, and a sanctioned game around 2 pm.
I agree there were no lessons on port days. I might even agree that on one day in a particularly juicy port, the 2 pm game was not ACBL-sanctioned.