We've bought property in Cabarete and I've had six out of my last eight trips out there have been solo, with five of them, to Cabarete. So, to re-itterate as already said, don't over indulge and keep your wits about you and you'll be fine. Also to add, if a 'pretty' (or even not so pretty) girl approaches you at night, she's after your money, one way or another! And as a single bloke, you WILL be approached by them! Just say 'no' firmly (unless that's what you are looking for of course!)
The main bar areas on the beach are the easiest places to get talking to people (and your hotel I'd guess).