Oceania pre-sells excursions - you pay with your booking. Tickets in the room. Then you meet in the theater at the 15 minutes before the proposed time and they give you a bus number. They call the bus and everyone goes off ship together. It's very well done.

VOYAGER:
MC to FLL 11/07
MC/Dover 6/06
MARINER:
BCN / Ven 10/11
Alaska 2001|2006
Panama Canal 2003
NAV
Caribbean 11/06
Bermuda|New Eng/Canada 6/04
PG 5/05
OCEANIA
Nautica |Ist/Athens 6/07
Regatta|Baltics 6/08
Riviera 2013 Crossing -Istanbul to Miami