Rematch option for race
An option to create the same race lobby again after a race. This could work in the following way:
A person finish the race. At the time scoreboard you see after the finish, you get a message "hold F to create a rematch". When you do that, the option will disappear for all other players that have finished (so you won't get 5 of the same lobbies) and you will enter as host in the new race lobby.