This made me learn one very important thing about Aikido - it isn't for you and your friends to train, its for everyone; so advertise.
Just an FYI. In days gone by in Japan, Aikido dojos did not advertise. Instead, they spread the word via exhibitions. The sensei would have his students give demonstrations at various events. Since it was the students who were performing, it was a good way to judge how compitent the sensei was. Also, word of mouth would spread a dojo's reputation.
Obviously, today this wouldn't be as productive. Advertising is a necessary evil. But it is just nice to remember tradition.
-"Great. What else do you do?"