Pennsylvania state liquor stores are forcing their employees to deny in-person service to customers who cannot wear masks due to medical conditions.
They have threatened employees with firing for any deviance from this policy.
PA mask order has the usual exemption—“Individuals who cannot wear a mask due to a medical condition are permitted to enter the premises and are not required to present documention of such medical condition”
https://www.governor.pa.gov/wp-content/uploads/2020/07/20200701-SOH-Universal-Face-Coverings-Order.pdf