I mean, that's what a group does after everyone has lead; so if it works that way, why wouldn't it work for a single person? Also, unpartied people are either in their own party or in no party. I think if you leave a party you end up in one state, but if you logout, you end up in the other; I don't really have any details on this, I've just noticed that sometimes I'm in the channel "zZhenyaParty" and other times I'm in the channel "zNoParty" when soloing.