3sum (two girl party – 2 Courtesans and client) and 4sum (three girl party – 3 Ladies and client) type parties are fairly common. Multiple Lady parties are usually more fun and exciting than a regular one on one party. Also, clients don’t seem to be as nervous in a multiple girl party because there are several Ladies to promote a relaxing atmosphere. However, a traditional one on one party can sometimes be more sensual and romantic.
I’ve had several 3sums and 4sums and they are fabulous! Although, more than a 3sum is usually not cost justifiable because it’s not probable that a client can make love and climax with each Lady. I’m sure the Courtesans would love to have a party involving a client and all of the Ladies, so it is a possibility if the client has unlimited funds.