I bumped into Caz at a Zulu Nation party around 2005 and I asked him about that.
He said when they first started Rapper'd Delight hadn't even come out yet. So there was no standard. All of the old school groups (Cold Crush, Treacherous Three, Fearless Four, Crash Crew, Funky 4+1) had no idea that Hip Hop was hitting outside of the Tri -State so they just did shows around The Bronx and Harlem, while the people that understood what was going on (Africa Bambaattaa, Kurtis Blow, Grandmaster Flash and the Furious 5, Sugarhill Gang and a few others) were touring up and down the East Coast and appearing on Soul Train.
But that generation had absolutely no idea what they were doing or how the music industry worked. As a result, a lot of those groups have tapes of their shows from the early 80s that sound like they were recorded over the telephone, but they only have a few songs when they were in their prime (1980-1984).
So they can't really tour because they never made an album and really only have two or three songs that they're known for, if that.
To have a show, you'd need all of the groups I named to come out and perform the two best songs that they're known for. But alas, those guys don't get along with each other. They're all bitter because Run DMC came and took their shine and they all fell off around 1984/85. In 1984 Run DMC, Whodini, Fat Boys, and Kurtis Blow all dropped classic albums while the real old school cats were sitting around with their thumbs up their asses wondering why they can't get any gigs.