Hey Martha I am a PV Riu bride. To answer your question, yes the beach is swimmable. I've never been there but Edyta and her FH have and they had a wonderful time. I'm so excited, I've seen nothing but gorgeous pictures there. Th landscaping is amazing.
The resort also provides boogie boards, kayaks, snorkellig gear, windsurfers, sail boats and peddle boats... LOTS OF OPTIONS. Are you thinking about vacationing there Martha?