I don't know if they do the ceremony, but have your tried the Bright Shawl?
I have been to Oak Leaf twice. once for a funeral and once for a wedding. It is old and most likely a very cheap (monetary wise). I would not suggest it, but if you have a 10k budget you could really spruce it up. Plus there is not a lot of parking and the area is a little questionable.
I'm getting married in Jan. 2011 and have done EXTENSIVE searches on venue's. I'll have to say that when I found out Pat O'Briens did receptions, I was totally in! I did keep looking but kept coming back to Pat O's. You get the whole upstairs and it's really pretty. They have a private entrance for the wedding reception so your guests won't get lost at the actual bar lol. They are very reasonable and the ladies in charge are amazing. The space is huge and does have a lot of character. I would totally recomed Pat O's. Atleast call and make an appt. with Crystal.