Call Al Osra Restuaurant near Mannai Round about, they do have a party hall with light music and even you can perform simple dances etc. Even though this is an indian restuarant, they have a very good party hall which can accommodate more than 100 person, but you need to book it well in advance. Their number is: 4311661/4319159
Fax: 4319941.
Good luck.