Legal Question in Business Law in Pennsylvania

Generally you don't need forms different from any other kind of business. Whether you want to operate as a corporation or an LLC or a sole proprietership, is up to you. Forms to incorporate or start an LLC are online at the PA Dept. of State's website.

The bigger problem will be getting zoning approval from the municipality where you want to open your business. I see that you are from Harrisburg. You will have to research the local zoning laws, and I would start at City Hall. Adult entertainment businesses often have a difficult time obtaining zoning approval and you will probably need a lawyer to guide you the process.

If you intend to sell alcohol, you will need a liquor license from the Liquor Control Board. This would be very expensive, and the LCB has strict rules controlling adult entertainment businesses.

Unfortunately, opening an adult entertainment business can be very difficult and expensive, depending on what type of entertainment you intend to provide. It is certainly not a matter of just filling out forms. You really should consult a business attorney to find out what is necessary to do in your area.