Not with most events. We’re usually at corporate events where we get swamped by caffeine craving folks who just want coffee. So we just do 1 size cups (8oz).
Even at slower paced events, we’d only get 1-2 guests who specifically want a flat white.
Maybe if we were a specialty cafe set up with guests who are interested in coffee as a craft / topic, the narrative would be different.
I understand the desire as a barista to want to serve the ‘right’ drinks, but I would say the first factor would be to identify what the guests want?