We usually always have first seating. Whenever there's been an evening session between seatings we've never had a problem making it. We may have had to rush through dinner a little bit, but we never missed out on a course or anything like that in order to make it on time. Just let your server know at the start that you're going to bingo and they'll move things along a little bit faster in order for you to make it on time.
Have you played bingo on a DCL cruise before?
The reason why i ask is my mother **loves** Bingo (I mean LLLLLOOOOOOVVVVVEEEEEESSSS bingo) but she didn't enjoy the Bingo on the ship. It didn't have the same feeling as playing in the bingo hall with dabbers and whatnot.