The revenue hotels earn from telephone calls, internet fees, fitness centers, the business center and other charges have tripled over the years. Recently an investigation conducted regarding four Wyndham establishments by Florida's attorney general led to a settlement of $2.3 million and a new requirement that all hotel fees be disclosed straight up. Wyndham has agreed to now make this part of their system across the country. The rest of the hotels however, could be slow on the uptake, so here are a few tips to avoid hidden fees at hotels: Avoid top business hotels. These hotels cater exclusively to business travelers and are quite intent on helping them on spending their per diem. Choose hotels that are against hidden fees. Take for example Omni and Kimpton who now have…