I am Episcopalian. I take a very small sip or a small dip (in cold/flu season). By doing so I do not feel I have "relapsed" or broken my sobriety. Some may think so and if they believe so... that is their decision. It is a personal decision and no one will (or should) deride you for it. In my church a man who has been sober for 30+ years does not take the wine. But there is another of similar sobriety who does.
Many protestant churches use grape juice which makes it all a moot point.
Frankly, wine tastes horrible, so I just dip/sip and go on.