Your entire staff doesn't live in the same building, have the same commute, or the same personal life. Offering flexible work hours lets your employees know that you care about their time in and out office. Why does this matter so much? Well, employees are starting to speak out and stand up for the type of companies they want to work for.
Just like no one person is alike, no one company is either, so why have an office that's just like hundred other offices? You don't have to pour millions into your design in order to have a space you and your employees will be comfortable in 40 hours out of the week.
Between work, personal life, and your sanity it can be difficult to find time to give back, which is why volunteering programs at work can be so helpful. Corporations are the biggest sources of carbon emissions across the globe, and that's not a secret anymore.