Complex sentence: Many users contribute comments describing the ability to drink 2 or 3 bottles of wine with no ill effects, however, they discover the next day that they did things that were embarrassing to everyone around them but they have no memory of these actions.
Split into simpler sentences: Many users contribute comments describing the ability to drink 2 or 3 bottles of wine with no ill effects. They soon discover, however, that they did things that were embarrassing to everyone around them but they have no memory of these actions.