I would say it totally depends on circumstances. A simple answer would be "no" since it encourages bullshit and I don't find the concept of paying someone to lie to you as being entertaining at all especiallly when there are far better uses for money.
However, this is a group thing and it might not be the best time to make a stand for rationality. I have encountered one tarot reader who made it very clear before she "read" the cards that there was no mysticism involved and she was using the cards merely as prompts to get me to think about aspects of my life I hadn't considered. If time permits you could find someone like that or even better, find a Darren Brown type person who has the skills but could trick them and then later explain how it was done.
Your call, tricky situation. Good luck!
Fortune telling is always promoted as entertainment although people who believe in it aren't swayed by that. I don't think one session is going to make believers out of people who were previously skeptical. If people did go for it I'd probably just be annoyed at hanging around people like that (the way I am annoyed when my pagan acquaintances assume everyone is pagan and talk about superstition and nonsense). If it's up to you, you can always say no. Fortune tellers are an even bigger waste of money than lapdances or gambling.
How to spend ones money is obviously a subjective thing.
If people go into it with their 'eyes wide open', then on one level so be it......and chalk it up to harmless fun. However, if impressionable people and in particular adolescents are going to be involved then may be reconsider.
Or as mistercliff commented, get a magician and have some fun in the knowledge that it’s just conjuring & tricks!!.
Not wanting to sound like a killjoy......but I personally wouldn’t want to give my money to a charlatan....would feel like I was condoning the practice!!:)
Oh my Gwynnies! Atheists debating sin... :)
What is the service you anticipate paying for? Bullshit? Entertainment? Then such fulfills the contract. If a future occurs congruent to prediction, that's grounds for suit.