Marchesa, a new 6,500-square-foot River North venue from Kathryn Sullivan Alvera and Jason Clark, who helped create Chicago hotspots Prosecco and Narcisse, offers four unique event spaces. The Art Deco-tinged Main Salon—at one point a pool hall, grocery store, and steak house—features a marble fireplace and brass bar; it has room for 150 guests for receptions or 100 for a seated event. The intimate first-floor Savarin Room, decked out with brass-and-bamboo chandeliers and a malachite ceiling, offers a front-row seat for two to 12 diners to watch Marchesa’s pasta chef at work through a picture window that overlooks the kitchen. With room for more than 1,000 bottles, the lower-level Cave room, outfitted with French tapestries and a gilded torchiere to evoke the limestone caves that lie below fine wine houses in France’s Champagne region, holds 50 people for cocktails or 30 for a seated meal. The second-floor Apartment space, modeled after a Parisian pied-a-terre, with hand-stenciled walls, silk damask drapes, and a baby grand piano, fits 80 cocktail reception guests or 50 people for a seated dinner. Executive chef Mark Sabbe, formerly of Mercat a la Planxa and Sono, can craft custom three-course dinners featuring French, Italian, or Spanish influences, or elaborate meals featuring intermezzo courses paired with fine wines. The venue’s vino selections range from $45 budget-friendly bottles to rare vintage selections; a private label Marchesa wine is also in the works.