"more than 10 people, some of whom bought coffee and pastries"
I wonder how many "some" is. Apparently, there were twelve people..space is at a premium in Starbucks, and I am guessing employees were trying to free up space for paying customers.
The employees went about it in the wrong way.
If I had a business, I would not want a group of twelve people, four of whom bought coffee taking up precious real estate for an hour or more...especially if the group came at a time of the day when a lot of customers who purchased breakfast, or lunch came in.
I agree. Isn’t there a mime convention they could attend somewhere? ;-)