The Monasterium Hotel in Ghent has several Family Rooms 

Family Rooms (renovated) for 1-8 people with modern bathrooms with rainshowers and airco, as well as lots of space. Some rooms have 4 singles, others 1 double and 2 bunk beds or 1 x double and bunk beds or 1 x double and 1 x sofa bed

There is 1 x 8 person room, with 2 double beds, a spacious bathroom, with walkin rainshower and separate bath, as well as 4 single beds for the kids on the mezzanine

King or Queen size double bed / Twin beds
Elevator present but some only by stairs
Some rooms have a mezzanine or sitting area
Maximum 6 persons 

Heating and airco (not in Classic Rooms)
Private bathroom with bath and/or shower
Hair dryer, bath products, towels
Coffee and tea making facilities
Desk , 24/7 reception
Free WiFi
Flat screen television