I think its more on the wording...
CheapCrash.com wasnt obvious at to what it ment or at least not to me, its like you left out a few words to shorten the name CheapPlacesToCrashForTheNight.com
v4Vegas.com - I dont get the " v4 " part...
TunesCafe.com - better then the rest but the " s " turns me off some.
They might be brandable but you could prob. find equal quality names available to reg.