'Houseparty' comes from two sessions, both recorded at the Manhattan Towers studios, not at RVG's place.
'Just Friends' and 'Blues After All' are from the first session, August 25, 1957. The one with George Coleman.
'Au Private' and 'Lover Man' are from the second session, February 25, 1958. The one with Lou Donaldson and Tina Brooks.
Other titles from the two sessions came out on 'The Sermon' which was released shortly after 'Houseparty'.