PRIVATE PRACTICE - "In Which Addison Has a Very Casual Get-Together" - Addison invites her fellow Oceanside Wellness co-workers to her house for a get-together, but no one RSVPs, the wife of Violet's ex-boyfriend visits the wellness center for medical treatment -- and Violet is none too happy about it -- Cooper counsels a young patient who is lovesick, and Sam appears on his first talk show promoting his self-help book, on "Private Practice," WEDNESDAY, OCTOBER 17 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/SCOTT GARFIELD) MILES HEIZER, PAUL ADELSTEIN