Day use question
I'm going to be going through Chicago twice this month, both times on a Saturday.
On the westbound trip,assuming my train arrives on time, I have a 12 hour layover between my connecting train from about 10 AM to 10 PM. I will have been up all night, unless I'm able to sleep on the train. I don't want to sightsee, because I'll be coming back to Chicago later in the week to do that with some friends (have tickets for the Obama Presidential Center). I want a place to hang out that day, relax, and maybe get a nap. I've looked at dayuse.com and found something I like that's only a mile from Union Station. Should I go ahead and reserve?
Or, considering how late some of the Amtrak trains can be, should I wait and find a day use room when I actually arrive in Chicago?
Then, the following Saturday, I have to check out of the Airbnb by 11 AM but my train doesn't depart Chicago until about 10 PM. So, same question, should I book a day use room now or wait until the day of?
I'd appreciate any advice from someone who has some experience with this. Are day use rooms more likely to book up during the week or on the weekend?