Under the darkened small top, just as the latest performance of Phare, the Cambodian circus, is about to begin, there's a minor commotion in the packed audience.
"This is going to be your best cruise ever," says our guide. "Because you're in West Africa, the happy place."
Wurzburg's baroque palace and history is only topped by a cold glass of the Franconia region's favourite drop, silvaner.
For those who travel to see places rather than sit on ships, cruising is getting ever more interesting.
Put these dates in your diary.
Blessings abound in villages along Myanmar's Irrawaddy River.
Glide peacefully through the World Heritage-listed Tasmanian wilderness of Gordon River where convicts once built magnificent Huon pine ships.
The best thing about these moments is that they happen again and again when you know where to look for them.
'Sailors' is what Virgin calls its passengers or guests and it's just one of the things the new cruise line is doing differently.
With these expert tips on how to find the best price you too will be joining the booming business of river cruising.
Markets, festivals and hip shops vie for attention with the big ticket sites such as Angkor Wat.
The ship's transparent roof shows off panoramic views of one of the most architecturally-famed skylines in the world.