Fear of the Unknown
Walking into a room where you have been before and knowing no-one is scary. I hate walking into a room full of strangers so I always avoid it. How? Simply by planning my day carefully and arriving early. I have presented for a decade asking tens of thousands how they feel and I can confidently say 98+% of people have similar fears
Every room you have ever been in and every event you attend in the future is always formatted in exactly the same way. There will never be more than 6 formats. There is the single person standing against the wall. Couples stand in open and closed formats as do trios. Then there is the scary groups of four or more. My advice is avoid the closed-formatted groups unless you know someone in there. Approach singles or open groups with a smile, good eye contact with a phrase like “Please may I join you?” or “Please may I introduce myself?”