It varied over time. Most often if during a service then they’d pray over a loaf of bread, break it, and two regular people would stand at the front, one with a plate of bread and the other with a cup of non alcoholic wine. And you’d queue and break a bit of bread yourself, and dip it in the wine. Some ate it right away, some went back to their seats. This would usually be during the response time of worship so while you were queuing there would be people on their knees around you praying, or weeping, or waving their hands, and you’d have to step over the various bodies prostrate on the floor, praying or otherwise “slain in the spirit”.

It would be done in house groups too. It would be much the same except you’d be sat on someone’s couch.