If they are going for variety and everyone doing a different dance then the following is likely using their remaining dances:
Gavin's Dances Remaining: Charleston, AT, VW and Samba
Scott's Dances Remaining: Charleston, AT, CCC and Foxtrot
Kara's Dances Remaining: VW, Waltz, Samba and Rumba
Pamela's Dances Remaining: Samba, Paso, QS and AT
Matt's Dances Remaining: Paso, Salsa, Waltz and Tango
Scott - AT and Charleston
Gavin - Samba and VW (Scott doing the only other 2 available for him)
Kara - Waltz and Rumba (only others available for her)
Pamela - Paso and QS
Matt - Salsa and Tango