Correction: "I'm interested in visiting Mecca. Who else is also interested?" "Iam" is not an English word. You need to writer either "I'm" or "I am". The collocation is "interested in". Because we use "in", the next word must be a thing or a verb+ing form. "Macca's" is what we Australians call "McDonald's". Be careful of your spelling! "Mecca" is what you meant, I'm sure. :)