Done, option is 'noparty'.

If something goes tits up, blame me.

~/A

Thank you all for your input. Added a flag to noparty, called
'solo'. Like so:
who noparty -> lists everyone without a party
who noparty solo -> lists everyone in a party alone
Note: if you're hiding your party status, the party will be discarded
from the list whether you're alone or with just one other member.

Anything not showing properly, please report to me.

Thank you,

~/A