This is a ride to 3 Floyd's Brewpub in Munster, IN for food and drink before heading back to Chicago.
It's about 70 miles round trip if you ride both ways. (but there's beer and food in the middle!) 15-18 mph. You can also opt for a shorter route home via the Flossmoor Metra so you'd only have to ride ~10 mi. after lunch/beer and there's also the South Shore Line in Hammond (~8 mi. from lunch) which now allows bikes on weekends.
We want to get there before they open at 11AM (it's one of the Top Brewers in the World and the line starts forming by 10:45AM). Bring money, an ID, a lock, water and snacks. If you think you might take Metra home, bring a bungee cord too.