Hi Bernie

Of course, I would mix them up, with assorted music, tempos, etc....Mexican people like music like Luis Miguel, Alejandro Fernandez, Vicente Fernandez, you can you tube this names and check it out....

Bachata and Merengue is more Caribbean, to be precise, from Dominican Republic. I know this because I am Mexican, play Cielito Lindo, Perfidia, Solamente una vez(You belong to my heart, Besame Mucho, Green Eyes (Aquellos ojos verdes), and if you know, Si nos Dejan, Como han pasado los años, Rancho Grande.

For the Dance music, Cumbias.....Boleros, I recommend LOTS of Cumbias.
Cumbias can be different tempos...
I sent you some material for dinner and dance too. Some MP3s and SMFs including the melody.

Manuel