- Speakers: I know the wedding coordinators have some nice speakers. I've heard they charge money though but it might save you the pain of toting them to Mexico.
- Dancing: There is dancing in the Plaza til 1:00am and the sports bar right beside it is open until 2:00. You can make song requests and one of the nights there was karaoke.
- Confetti: don't know on this. We forgot all about making an exit and all just went to the disco. I regret this one a little bit.
- Group excursion: Ariadna, one of the WCs also does group excursions, so she'd be good to ask. Most trips take all day. We never made it out b/c they require early mornings and we just wanted to relax, but our guests went to Tulum and Coba and loved both. Coba is less touristy but the pics of Tulum were breathtaking. Other options are zip-lining, snorkling, Cozymel, shopping in Playa del Carmen, and exploring cenotes. Some of these options can be combined, and there are numerous tour companies located by the lobby at the VIM who offer tons of options but you need to book the morning before.
Finally, my experience was that the WCs didn't respond super quickly to all emails (because they're VERY busy), BUT once I was there, I felt like Ariadna and Ana would do anything to help us and were as prompt, friendly, and accommodating as anyone could ever hope for. I recommend that you write down your list of questions and ask away upon your arrival. When we were checking in, Ana came down and asked us to meet with her after check in, then we met with Ariadna (via appointment) the next day for about 2 hours going over everything. She even asked questions I never would have thought of and really does take care of it all.