LSshock

Hi everyone, I'm trying to find a forum system that can fullfil an important feature i want to have on the forum. A sub forum will be for making group (game party) for people to join So the post would look a little like below, The button would add you to the list of people that want to be there that day. So something like a Like system would be fine too, since it could be altered a bit. Thanks in advance for any recommendations