Use the lag switch method when going into a lobby turn it on until it starts to count down once the awaiting gamestate comes up you turn it off.. worked for me :-)
You can try uploading a video to a hosting site e.g Youtube, as it's uploading, join a game and vote for a map. After you have voted, cancel the upload and people will start to join your lobby and you'll most likely be host. It's the method I'm using now and it works 9/10 times.