Not able to help with the room, however so long a you dont mind amatuers on stage who try to do a good job, there was a fantasic comic (blue) but very good, although we were not very impressed with the entertainment we found that meeting others and chatting was just as entertaining.
I've cruised on the ship but do not know what the 'Marquee' is. I though deck 5 and deck 7 were exclusively cabins, no public rooms as such? Cunard's production shows (song and dance) tend to be excellent. Other acts can vary.
My mistake - wrong ship - I read it as QV (Queen Vic) rather than OV2 - Duuuuuuh....sorry!
Yes, you're right about the location, under marquee. Don't know whether it affects your cabin, but marquee isn't a late- night venue. Also got a feeling you may be near the anchor, so can be noisy when they drop anchor (only used when parking off-shore, mebbe one or two destinations). Entertainment is "mixed", generally poor reviews tho' each to their own opinion- here's mine: Good resident band, poor resident singers, pot-luck with bought-in comedians and tribute acts (some excellent) decent top-deck show weekly, amateur bingo (but popular), quizzes etc, poorly run daytime entertainment - cook-off, ice-carving etc. Those who compare OV cruises with Butlins are being very very unfair generally, but with the entertainment - well, mebbe they've got a point. All sounds a bit negative, but in all other respects I rate OV highly, you'll have a great time. Chris.