I think we all have various "rituals" and ways that we perform a reading, and that's all good if it puts you (and perhaps just as importantly the querent) in the right frame of mind.
You'll see as you read through these forums that there are many of these rituals that people use. You should also appreciate that there isn't a right and a wrong way - just a right and a wrong way *for you*.
When I'm doing an online reading, I have so little space that I often end up laying the cards out on the keyboard of my laptop (I move them out of the way to type, btw!
).
If I'm going to read in a coffee-shop or a bar, for example, I don't really want my cards laying on a sticky table, so a cloth might be the best way to go there. Also, I want to be able to carry my cards in a pocket, so putting them in a bag, with the cloth around them is useful to me.
But don't let not having a cloth put you off reading for one moment. Just do it!
When I read cloth, I like to put out a grid of tarot cards first to lay it on...
Graham.