The partybus is the best vehicle ^^. Drive around and when you get near someone they are sucked up into it and can't get out. Then you drive around the map picking up players.
Thinking of making a full AI for it so it randomly gives players weapons or takes them away on the journey, and has an inbuilt "coms system" that chats to the players as we arrive.
Actually now that I think about it telling EVERYONE where the partybus is might be funny, as they see it getting closer they might panic.