Ads For Fun is the best site for meet ups for casual fun with local women who meet within minutes!
It really depends on which country you are residing in. Visit https://theporndude.com/best-escort-sites to get the list of escort sites. If you are in the UK, there are alot of websites and free classifeds sites that have escort sections. Backpage is a well known one, which has escort sections in every country.
Friday Ad is quite popular too. It has lots of local women advertising everyday in all counties and cities.
Eros is a huge website which has more upper class women which is great if you have plenty of money to spend! But at least you have the peace of mind it is being run by professionals and you should be safe from scammers.