Actually there weren't private disco buses either. The discos were also closed for the holiday.
EDITED TO ADD:
The prosecution countered that the public buses weren't running but the disco buses were, and people were dressed in costumes on the 1st as well, because Halloween was still being celebrated. As you are stating here. But on the 1st, there were no buses running, not public or private. The discos who regularly ran buses in the Piazzo, both public and private on the 31st were questioned and they confirmed in court that they did not run buses the next day on the 1st, because of the holiday. All of the discos who ran buses on the 31st were questioned and all said they did not run the buses. The prosecution said other discos might have been running buses, but they have never provided a shred of evidence of these mystery discoes. These discos who had not run buses in the Piazza before, but randomly decided to run them the 1st.
Curatolo is remembering events from the 31st, OR his memory is poor and he is getting multiple events confused. Either way, his testimony cannot be used because the truth cannot be ascertained from his memory.