As I am sure you know all main line protestants share one service. At the time I think the lead Chaplin assigned to the base was Episcopalian. We lived on the Alameda Navel Air Station and attended the base Chapel. The chapel attendance was often near 200. On this Sunday bad weather kept many people away and only around 50 were in the service. We had Communion that and he prepared for about 200. I had a Baptist background but I have already become familiar with the use of wine in services, but unlike Baptist all the wine must be consumed in the service. We sat there and waited for him to finish drinking all the extra wine for about 10 minutes. I grew to enjoy these type of services and never knew of any conflicts because of them.
Odd. When I serve, well into the service one of my functions is to count the expected communicants and tell the priest as he prepares for the Consecration, so he has an idea of how much wine and how many wafers to prepare for this specific Communion.