I'm going to meet with a female friend after having just organised a date with another friend
Does this friend have something to do with your date?
Yes, I'm going to have sex with my female friend.
I hope your female friend that you're dating other people too. You should be honest about it instead of giving your friend false hopes. Would you be willing to take your friend on a date instead?
I totally am, hooked up with chicks all the time. Want to come over sometime.
It is wrong to lead people on if they think you want a relationship. They might want something more committed and filtering out those people would hurt others the least amount.