It All Depends
Quamilus said:
Listen. there is no need to be insultive. blah...blah..blah...[snipped]..... very much be appreciated.
If you are staying in an AI what town is like any time of the year is moot because you can stay in the resort and not see it.
If you want general advice don't travel to the DR during Semana Santa if you can avoid it so you can have more peace and quiet that you'd likely experience other times of the year. You can party but you wouldn't have to put up with hordes of people covering every square inch of the place.
As for AI's I avoid them like the plague and as for having "wild" times including partying with local girls you aren't getting them past the front gate of the resort at all.
Be clear what you want but if it's to get wild with women of ill repute, AI hotels are out, and Semana Santa the entire week would be a drag. Go the week after and stay in a decent tourist class hotel that allows, ahem...guests. I can't tell if you want a wild time or if you want to avoid it - the 3 25 year old guys partying sounds like you do.
What city is the Viva Wyndham etc., resort in anyway? It's a big country and unless the name of the resort contains the city it could be anywhere. If you were going to POP for example, you'd probably have more fun with the guys at the Blackbeard's Adult Resort (in which case the other family members better be pretty open minded). In Punta Cana, there's not much other than the AI's. Boca Chica you can have fun and not spend a lot.
P.S. If I truly wanted to be "insultive" I'd have said "insultive" is not a word. "Insulting" is though. The post was more insolent than insulting. I admit that.