Choose the caption bubble to begin. If you want to upload a custom bubble or alternative image then submit the caption first, then edit the comment and attach a "Place img". Once the image is approved you can use it by editing the caption again.
Some people don't like being stuck in a room all alone playing games. I know I prefer to be at the Internet cafe so you can watch other people play, talk to them, etc. It's like drinking alcohol at home or drinking in a pub.
When you explain it like that it does make sense, it seems like you offer a lot more than just PC's with internet access, looks pretty good from the pictures.