"In Catholicsm, the Pint, the Pipe, and the Cross can all fit together." ~ GK Chesterton.
Consumption of alcohol is mandatory at certain times (as part of Mass) and forbidden at other times (Ash Wednesday and Good Friday, but traditionally every Friday and all of Lent).
Also I thought I was going to be corrected on the other part of my claim. Apparently abstaining from alcohol on fast days isn't centralized Catholic doctrine and bishops/archbishops have some discretion on what they tell their congregations to abstain from.
In the middle ages, 'small beer' [0] was a low-alcohol drink which because of the brewing process was often safer than bacteria-contaminated water from some natural sources such as wells and streams
Besides the rules to give the Trappist label were :
* The beer must be brewed within the walls of a Trappist monastery, either by the monks themselves or under their supervision.
* The brewery must be of secondary importance within the monastery and it should witness to the business practices proper to a monastic way of life.
* The brewery is not intended to be a profit-making venture. The income covers the living expenses of the monks and the maintenance of the buildings and grounds. Whatever remains is donated to charity for social work and to help persons in need.
While some Methodists now drink alcohol, they historically didn't and still won't allow it in their church buildings (I used to play in an amateur orchestra who had to serve non-alcoholic interval refreshments when we hired a Methodist church for our concert).
The majority of Christians worldwide, though, belong to denominations with no proscription against alcohol.