This!^ Go park your car in front of the neighboring boba shops and analyze their traffic. Who are their customers? When is it busy? Office workers on lunch? Kids after school? Do they hang out or grab & go? Focus your marketing efforts based on what you learn.

People are creatures of habit. You’ll need to steal existing boba-drinking customers from your competitors (rather than convince non-boba-drinkers to try it). And you’ll need to do this now, while your business is still new/fresh. Let the employees go; if they were sufficiently driving sales (via social marketing or just being hot), your bottom line would reflect this.