Using iPad to Identify the Number of SSIDs Across 2.4 GHz Band

What's the most number of SSID's you've ever seen transmitted across a single band (2.4 GHz)? The image below is no record-setter. Using an iPad & Oscium's WiPry-Pro, it's clear that there are five radios and three SSID's transmitting on 2.4 GHz:

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So, what's the most you've seen? And what's the most that is possible?