How to get the word out about a new business?

[Lady Six Sky]

My mother was unemployed but really needed another job. When she went to the store to buy something she ended up talking to the owner and as it turned out the lady owns the rec center next door too. The owner never payed much attention to it, just rented it out for weddings once in a while, but recently decided to try and expand upon it.

My mother has some history in marketing but it was mostly for apartments. But the lady talked to my mother today and decided to let my mother give it a try. She will be an independent contractor and won't make any money unless it gets rented out/used for some purpose.
My mom is going to have it cleaned out, but beyond that we don't know what to do. I know there's twitter and that, but not much else. The owner is willing to invest money into advertising but she is leaving the methods up to my mother. I guess what I'm trying to say is what do we need to do to make it a success?
We don't know how this stuff works or what to do but we need to make it work or else we'll have to stay a burden on my grandma, who we've been staying with, permanently.