For those guests who are transgender or non-binary, use of the word "sir" or "ma'am" may be actually perceived as offensive.
TRANS-FUSION — Harriet Hancock LGBT Center
Trans Day of Visibility! - First Religious Society of Newburyport
Trans and Non-Binary Resources – Counseling Center
Serving Transgender, Non-Binary, and Intersex Clients - DHS
Supporting Trans and GNC Students
Event on LGBTI and Feminist Movements - RFSL : RFSL
Gender-Inclusive Language: How to Support Non-Binary People
Mx. Gender-Neutral Honorific
Gender Inclusive Event Design Tips
6+ Easy Gender Neutral Ways to Greet People in Customer Service
Gender-Inclusive Language: How to Support Non-Binary People
How to Use Gender-Neutral Words
Transgender Awareness Weeks
How to Write Emails That Are Gender Inclusive