Yes, this is true.  An employer in Miami required employees to attend courses at the Church of Scientology, and also “to spend at least half their work days in courses that involved Scientology religious practices, such as screaming at ashtrays or staring at someone for eight hours without moving.”   Sounds like “The Master.”    

They also required one employee to undergo an "audit" by an "E-meter"  

"According to the EEOC’s suit, employees repeatedly asked not to attend the courses but were told it was a requirement of the job. In the cases of [two employees], when they refused to participate in Scientology religious practices and/or did not conform to Scientology religious beliefs, they were terminated."  

Anyway, the EEOC sued the employer, Miami’s Dynamic Medical Services, which provides medical and chiropractic services, claiming that “Requiring employees to conform to religious practices and beliefs espoused by the employer, creating a hostile work environment, and failing to reasonably accommodate the religious beliefs of an employee all violate Title VII of the Civil Rights Act of 1964.” 

It is interesting that at a time when Scientology is contending that, at least for tax purposes, it is, in fact, a church, its "religious practices" are resulting in an alleged Title VII violation.

One EEOC lawyer said that "Employees’ freedom from religious coercion at the workplace must be protected," and another said "When an employer makes an employment decision based on employees’ failure to adopt the employer’s religious beliefs, it violates federal law.”

Takeaway:  If you want to force employees to scream at ashtrays, make sure there is no religious aspect to it.