Well the first thing is have the basics there: stating when and where you meet including things like time, days, dates, etc. You must mention if there is a car park at the venue or not. Also how to get there. (Include options by public transport as well as by car.) Are refereshments available onsite? Always include the website if you have a website.
Then state what you plan to do at the chess club. Do you plan to have a club tournament. Or play in local leagues. Or just friendly matches. Is it for all levels of chess player? Are there chess books to read? Do you plan to actively involve local schools?
Then with advertising it, whilst obviously you won't have a huge (or any) budget, local leaflets and newsletters do work. That is how I joined my local club. Good luck with it.
I am looking into forming a chess club in my city since we do not have one. What should I look out for or include to make it more promotable, fun and worthwhile?