Almost everywhere where people gather online, a chat feature is available. Either in specific forums or as instant messenger of your email provider. The disadvantage is evident: as a chat partner it is only possible to choose contacts from your own address book and only when people are online to chat.
If you´re looking for a variety of chat buddies, you should choose a chat or a messenger which you feel comfortable at and where you think you will stick to. Because if you know at least a little bit about eachother it will be easier to make conversation, opposed to meeting face to face.
Chat communities on the internet are a dime a dozen. Usually they offer several chat rooms, which are targeting specific age groups or covering various topics. You can find chat rooms to flirt, find singles, for every age group young or old.
On most dating platforms you can simply sign up as a guest so that you discover the website and their features and browse around on your own time. But initially, you should create your own profile to make yourself available to others. Because the more they know about you the better.
Once you have created an appealing profile, the more likely it will be clicked by other users. Almost all dating platforms offer options between a large common chat room for multiple users and one private chat where your conversations are being kept strictly personal.