It’s back to business for Atlantic City’s casinos. The Hard Rock Hotel and Casino, a gambling mecca, was allowed to reopen for the first time in almost four months, just in time for the Fourth of July weekend. But the task of keeping a casino safe from germs is no small challenge. Additionally, the governor of New Jersey announced last-minute that alcohol would not be allowed to be served in public spaces, and dining inside is on hold, as is smoking inside. Casinos worry it will affect business.