You anecdotal observations are not statistically relevant.
But wait: you say you drove past every single TP every day over a period of time and observed the number of motorcycle gang members in the parking lots, and collated your findings in an Excel file?
Good, then you may have the first inklings of statistical relevance.
They just looked right at home, business as usual on an average midday afternoon.
Saul Alinsky tactics don’t work on me.