Typically, guests perform the prosperity toss - or yusheng - to celebrate the occasion. SINGAPORE: People are not leaving their Chinese New Year gatherings to chance. Eateries are seeing a spike in reservations in advance - even earlier than was the case last year - ahead of the festival that falls on Jan 29 and 30. Typically, guests perform the prosperity toss - or yusheng - to celebrate the occasion. The Chairman's Lounge at Pan Pacific Orchard, which seats up to 16 people, has seen a 20 per