Alyssa Arce

Alyssa Arce and Tyrie Rudolph had all the room they needed for activities on their friend date at the beach ... and they definitely took advantage. We got the two Wilhelmina L.A. models in Santa Monica soaking up waves and rays ... and then gettin' their smash on in the sand. Talk about F-U-N.

Justin Bieber is on an absolute tear in Ibiza, and his latest conquest might be his best -- the Playboy Playmate he held a late night make out session with on a yacht. Biebs was photographed hooking up with Miss July 2013, Alyssa Arce on Thursday night. Our sources say she and Justin met on…