Actually for the remaining of PD12 we now know that there will be another event in the evening with Liam Sophia Cathy and her husband to be Andy between 9 and 10pm. Which makes difficult to place Sam's concert, it could be before, like an apero-concert kind of thing, or later, but it will be a bit late, given that Sophia has to work the day after as stated in the game.
This event also raises the question: What are they gonna ask them (Sophia/Liam)? To be best man and woman maybe? Or the swinger path (if any) is starting from here? Given the new pace it won't be so surprising (I mean not that anything will happen but maybe the things will be set in motion, especially after what happened during the dress event)