John & Jen's 4-Star Reunion!

After a relaxing trip to Mexico with friends, John Mayer traded in his cigars and hot tub for a suite at the Four Seasons Hotel in L.A.

An insider tells OK! that John, 30, is currently staying at the posh hotel until he plays his next gig in North Carolina on Aug. 19. And it looks like the first person Mayer wanted to see upon arriving back in town was girlfriend Jennifer Aniston.

According to a witness, following her daily yoga session with trainer Mandy Ingber, the 39-year-old star left her home for the first time in days and headed straight for the Four Seasons.

Ahh, a lovers reunion...Wonder if there's a hot tub there?