As the question said, how would you get introduced to a Patron in old Rome?
Would you merely go to the Roman version of the town hall and inquire about which people were available as patrons and then show up at meeting hours and introduce your work and hope he would take you on?
Or was it it more of a "I know a guy, who knows a guy whose roommate's uncle is friends with someone who knows of a patron and for 5 Aureus I will set the wheels in motion, to get you introduced to him and he MIGHT take you on as a client.
Or was patronage more about who you were, as in since your uncle was a general under Caesar Augustus, your uncle can use his connections and write you a letter of introduction to the family of Pompaius who will become your patron. Basically unless you were someone or your family was, would you NEVER get introduced to a possible patron?