Mercantile Hall can hold up to 220 guests, seated.
Keep in mind that this largely depends on your needs for the main room - band/DJ, buffet tables, lounge areas, etc. could change how much space is available for seating. Your guest count may need to decrease if part of your vision includes floor space for something other than a guest table.
We highly recommend not inviting more guests than what the venue is able to hold. However, if you're seeking a venue with a higher capacity, check out our sibling venue, 10 South, in Janesville, WI!