Private Dinning for 20 in Minneapolis
Three suggestions in Saint Paul.
Mancini's Char house in Saint Paul, Old style steak house on West 7th, great with large groups, food is good, nothing fancy or unusual, just good and they often bring out extra apps or deserts (on the house) for large party's. Also a neat atmosphere, you can picture a mob boss in one of the round booth's in the corner.
Forepaugh's is the opposite of Mancini's. It just reopened under new ownership, remodeled with a new Chef and menu. It's close to Mancini's located in a Victorian Mansion and there are several rooms that would accommodate 20. The new menu is innovative and delicious (the third floor is also rumored to be haunted)
WA Frost - not much to say, St Paul tradition, great atmosphere, good food, several options for party of 20.
My pick out of the 3 would be Forepaugh's, my wife and I were there last week with a two other couples and the food was great.
whatever you end up doing, have a good time!
jax cafe in northeast minneapolis has several private rooms for different sized parties. price point is about right. jax is very venerable, celebrating its 75th year of biz this year-- so the menu is quite old-school, but charming. good service.
i don't know if this will be during the rep. natl. convention, if so, it might be tough to get a private space anywhere, so i'll also throw out these suggestions: jp's american bistro (basement room), one of the private spaces at w.a. frost (st. paul). there are upstairs areas at 112 eatery and restaurant alma, which could theoretically be reserved for a large party, but they might be noisy from the restaurants below, so are perhaps unsuitable-- only an idea.