number we went on a fabulous Royal Caribbean cruise around the Med and it was not posh at all, just luxurious. If people want to dress up, there are captain's table nights and formal dinners, but plenty of other dining rooms to choose from, too. We spent much of the time casually dressed, and if we used our table in the formal dining room, I just wore something a bit smarter, but not an evening dress. Try it - I avoided cruising for years, as my sister would return with photos of her and husband in evenng dress and black tie, looking very stiff and formal with the captain. Not for me, but suits some people.
My cruise consisted of lazy breakfasts looking out at the port we had anchored in before we woke, coffee and a read on deck, excursions for wine-tasting or to explore the area we had cruised in to, meals out in French and Italian olive groves or vineyards, pizza in Naples watching passers-by, back on board to shower and go through the book of cocktails, dinner watching dolphins leaping alongside the glass-sided dining room, roulette in the casino, a show, then round the evening off with people of all nations, singing our heads off in the piano bar. Great fun, and lots of quiet places when you just want to relax (I had a snooze on the sofa in the library one afternoon). Go on, go on, go on......! 