The league has forbidden players from playing basketball anywhere but at their homes since March 19. That directive was reiterated to teams in a confidential April 27 memorandum obtained by The Times, which said that players were to avoid public health clubs, fitness centers, gyms, college facilities or “the like.” Yet one Western Conference player, who requested anonymity, said he was aware of some fellow players who had ignored league and government directives, arranging secret shooting sessions in unauthorized gyms.