if you have UOB credit card, u can try the below:
211 Roof Terrace Cafe @ holland road shopping centre
1-for-1 pasta or pizza
valid till 31st Aug
with min purchase of 2 standard drinks
another one is 1-for-1 regular pasta or pizza @ modestos
valid from mon to thurs
valid till 31st aug
not valid on national day and eve
