In most major metropolitan areas, trendy restaurants are a measure of a person's social status. If we've learned anything about the high rate of restaurant turnover, it's that nobody gives a fuck about these places after, say, three months. So, "foodies" like to get there for the opening.
Look, restaurants are notorious for not having their shit together. In fact, if you care about the food, opening night is the worst time to go. The kitchen will be overrun, which means you have to feign three hours of conversation with that bloated, balding schlub you dragged along to pay for the meal. Is that worth a Facebook "check in"? We thought so.