I'm not entirely sure if these posts are talking about the before or after dessert parties. I can vouch for the fact that neither the terrace nor the plaza view before parties serve alcohol. We've done the before party, plaza level, several times. We are always told that we can use either serving line, depending on which is closer to where we are seated. If you go up the ramp and are seated to the right, the upper serving line is closer, and if you're seated at tables to the left of the ramp, the lower seating line is closer. If we're seated in the left hand area, the CM always encourages us to use the terrace level serving line because of its proximity to our table, and we have done so a few times. We've used both serving lines for the before plaza party, depending on where we were sitting, and there was no alcohol at either.