I feel your pain, I had the same problem trying to get in last night.  A solid hour of log in, can't do anything, then host disconnects.  I managed to get almost an hour of play between disco's, then got 4 more in a row.
I don't know what's going on, and I'm not faulting anyone.  For all I know its Verizon or something between me and HTC.  But its very maddening I can go into the Training Room without a prob, or the CT.