If every performance is a standing-room-only affair, then you’re already in a great position to increase ticket prices. High demand drives urgency, meaning your audience is willing to pay more, and it’s unlikely that a slight fee increase will deter them from purchasing tickets.
Real World Example:
A community theater in Oregon sold out its summer musical performances year after year. They increased ticket prices by a mere $2 per ticket to cover rising production costs, resulting in $400 in additional funds per show. This small price increase allowed them to cover rising costs without losing a single ticket sale.