Check about possible outside events as well as places like that can be used for other meetings, one of my former workplaces used to have senior staff meetings in a similar kind of club and we'd have a tea put on.
I guess things like Weightwatchers but with food, conferences, meetings, seminars etc...
Do they hire out for parties and similar functions?
A good and versatile and economical buffet selection is good for that eg rolls, sandwiches, crisps, sausage rolls etc...
You would need to be flexible to tailor to individual needs eg a kids party up to a tea dance or even wake to a professional meeting.