Marina Mandarin hotel is located next to Marina Square shopping centre. There is the Marina Mandarin ballroom and the Vanda ballroom to cater for different capacities. The hotel is a short walk from Cityhall mrt station or Promenade mrt station and close by Suntec City and Convention Centre. I found their banquet rates and the good news is, their price is nett.
Found the banquet rates 2013 per table:
Wedding Lunch: $900/ $950
Wedding dinner : $1028/ $1058 (weekday)
$1278/ $1338 (weekend)
Ang Pow rate for breakeven:
Wedding lunch: $100
Wedding dinner: $110 (weekday) - $130/$140 (weekend)