This Bon Bon Lounge, opening after the main meal, puts the cha-cha in chocolate. Guests can sip demi-sec champagne like Pol Roger Rich NV—its sweetness pairs well with dessert—then take a hammer and chisel to the block of seriously dark chocolate. Glass bell jars, Jamali Garden Supplies, jamaligarden.com. Glass jars with lids and stainless steel place card holders, all, Crate & Barrell, crateandbarrell.com. Calligraphed cards, Sloane Madueira for Press New York, 212-539-0184.