If you are only interested in fooling around, there are many other mud servers. You will then be prompted for your gender, email address and real name. They are for listing the current users logged on. Visitors can not leave the gate room, though.
Registered members have extra access rights.
The registration room can only accommodate one person at a time. After registering, ask a staff member to active your membership access rights. For those who are familiar with IRC, the rooms are similar to channels. Depends on which room you are in, there might be some other movement commands. After getting some experience, you might want to simplify typing long commands as you use them over and over again.