During my recent trip to Mt. Abu, I had stayed at Hotel Maharaja located near Polo Ground. Its a popular hotel in Mt. Abu.
Rooms were cozy and clean and so were the bathrooms. Room Service is quick and polite. They offer almost any veg. dishes - Gujarati, Rajasthani, Punjabi, Chinese, Fast food etc in room as they have 4 restaurants too. Plus they don't charge extra for room service. BTW food was delicious.
They charged INR 900/Day but their tarrif card says Rs 1590/Day. Anyways avoid Mt. Abu on weekends as lots of chaotic tourists would spoil your holiday.
Sorry but I don't have their pics but their website is...
Hotel Maharaja, Mount Abu