Yes, if it has less than 100 employees. But a boat with fun and games going nowhere is called a riverboat casino, and those are big business.
Well, it is an unusual business. Better have plenty of liability insurance, if you ever get to the point of starting such a business.The closest thing to this concept, I feel, would be floating casinos and harbor cruise vessels that you see in cities where there is a river and interesting skylines to look at. Like in Washington, DC or New York City. These can be very popular and some seem to be a big business.From my research, I found that the US Government usually considers a business small by comparing it with other businesses in the industry. So if yours is much bigger than all the others, it probably will not be a small business. On the other hand if you truly are starting out small, yours might be considered a small business. Oddly, this often results in some darn big business being considered small when the government is giving a loan to the business. If you are in the USA, you can check with the Small Business Agency.