Is the congregation sharing with another one?
If so, there is the parking dance. If you are first, everyone must leave right away afterwards so the next one can park. That means that congregation will be encouraged to be sure to come early and "associate" with the new ones and returning ones.
If you are last, then you play the parking dance when you get there. Officious attendants will tell you where to park.
Brothers who haven't had the time of day will suddenly jump to great you when you come in and help you find a seat. (get there early, many come at the last minute.....) Save your seat and mingle, hahaha. You know the drill. Nosy sisters will try to find out what you don't want to tell them. There will be a table on the stage, with a nice linen tablecloth, linen napkins, several wine glasses with red wine already poured (has to breathe you know)(usually 3 to 4 depending on the seating configuration), a flower arrangement, several crystal/china plates with cracker looking bread. The elders (sometimes MS sit up in the front or side row. They will be passing the bread, wine, praying. Their wives cannot sit with them. You will find the elders more friendly and talking to new people, hand shaking, hugs, not seen at ordinary meetings.
Once seated, song, prayer is given (sometimes by the speaker) then he drones on who can't partake, why we are here, talks a little about the bread, usually using the Corinithians account by Paul rather than a Gospel account. An elder prays over the bread. The servers grab a napkin, put it over their arm, grab a plate of bread and work in twos down a row, handing it the first person on the outer edge and the last one giving it to the second brother. Each twosome does this until their section is done. They back to the special row, passt it to each other, and one passes it to the brother on the stage.
Repeat with the wine.
Brief conclusion and prayer, song.
If last congregation, some people linger. Some are quickly gone. Others go out to eat (secretly) or to someone's home for a nice meal.
Blondie (I know I left something out. Is it when the elder's wives come dancing down the aisle after the first song? smile)