Exclusive: Inside John Mahdessian's 50th Birthday Party 12 photos Next GalleryRHONY Takes On Atlantic City 10728066 John Mahdessian and Dorinda Medley 10728046 Ramona Singer and friend 10728051 Dorinda Medley and John Mahdessian and friends 10728056 Melissa and Joe Gorga 10728061 Jill Zarin and friends 10728071 Melissa Gorga, Dorinda Medley, John Mahdessian and Joe Gorga 10728076 Ramona Singer 10728081 Jill Zarin and friend 10728086 Melissa Gorga, Dorinda Medley, John Mahdessian and Joe Gorga 10728091 Liza Sandler, John Mahdessian, Susan Doneson and Tabasum Mir Previous Pause Next 1 of 10