Well, lots of things. Let's take a look. But if it's only virtual space you need, the Internet offers a slew of virtual offices. Meeting clients generally isn't an issue as most of that is done by phone or e-mail, and many of my clients aren't even in my time zone. On the odd occasion that I do need to meet a local client, I always visit their office.
Most hotels have meeting rooms of various sizes although there is a cost involved.
But, from a professional standpoint, you maintain an image, make it more convenient for the client, and most meetings rooms can be set up for flip charts, projectors, and coffee. Call a local business center. They seem to be popping up everywhere. These centers rent or lease everything you need to run your business, from receptionists to fax machines to boardrooms. Many small companies even pay a small monthly fee to office centers to use their receptionists, who route all calls, not to an internal office, but to their home office.