The best platform for finding a mutually beneficial arrangement is Seeking. This site offers many options for sugar babies and sugar daddies looking to have a one-night stand.
This website was launched in 2006 and gained instant popularity due to its unique format. It allowed anonymity and the members didn't feel shamed for wanting to have a relationship.
Registering is free and you'll receive 10 messages for free. The average monthly cost is $90. The website is completely free for women, which is why they are more popular than men.