Making a lobby manager

Hello, so i am making a 1v1's game, and my idea for making the lobbies to manage the connection between both players is the following:
a thread per lobby, with a new socket with an open udp port
the client would connect to the server and after that he would be redirected to an already existing socket in a thread or create a new thread with a new socket.

would this work? would it be too annoying for the server, any better ideas?

Thanks.

 

Or maybe having a list / dictionary of threads and have the client give a message about which thread it is and do it with multiple clients through only one socket?