Most of my work (not cooking) has been through a traditional publisher, but I've looked at doing some smaller-run stuff through a publishing-on-demand site, and the one I liked the best was iUniverse.com, which will also let you get an ISBN number and people can order it through Barnes & Noble and Amazon. However, they use a royalty model (although I've never looked at them for just printing/ordering).
What this means is that if you want maximum flexibility and least financial exposure, something like that would be best.
On the other hand, if you want to maximize financial returns, then you want to just get a printer/binder and place a pre-order. You pay for the printing, but you'll be stuck with the books if they don't sell, but if they can Publish on Demand, then you can just order the minimum you think you need and ask for another, say, 50, when you want. That way you get to keep all the $ (less actual printing cost).
For instance:
http://www.cafepress.com/A few other ideas:
Call up your local newspaper - they often do custom (outside) print work and can often recommend someone if they can't handle the job themselves (you'd be surprised what some of them can do, and it often has nothing to do with printing newspapers).
If you live near a large university, get in touch with their print room. Many have university presses and, particularly if it's a state university, might do a damn good job for practically nothing.
Check out a local graphic design / print shop. They may help you lay it out, if nothing else, and/or can do a small binding run relatively affordably. In fact, if you don't mind, you could offer them ad space in the book or on the back cover in return for a reduced print rate (but see what they would charge normally and then ask after that).
Ask at Kinko's / Staples - they do this kind of stuff. You might even be able to get the rates online.
Also, if you don't know how to make a .PDF file, and I assume you aren't familiar with the DP programs, and if you're not an expert at laying out in Word, ask your club members. If you have enough people to put together a book, then SOMEONE must have graphic design / layout experience.
Although I would say if you do the PoD route, many of them will take your basic stuff and help you with the layout (some for a fee).
Good luck! Any questions, just ask