was the toughest invite to get in town -- but we might have to eat our words.

Because tonight's Dinner for Haiti Relief, a fundraiser at Rioja (1431 Larimer Street) featuring seven chefs and six courses, is completely sold out (with a waiting list).

That's 148 seats at $125 a shot, with every penny going to the Denver-based Project C.U.R.E. for its efforts helping Haiti.

We'll drink to that -- just not at Rioja tonight, since the restaurant will be completely devoted to the benefit.