prolly NSI is best bet...
i'd really like to experience a girl-on-girl show at an amp, this seems to be a rarity with most 4hand deals around here tho.
All of my 4hand sessions consisted of "oh, we don't do THAT!" when prompting them to service each other.
They are in the business of pleasuring men but get all uppity when asked to pleasure one of their fellow amp girls... it's not like i'm asking them for a Hot Karl or an Alabama Hot Pocket for christ's sake, but you'd think i was by their shocked responses.