As a frequent library user, I would like to make some suggestions...
...it would be nice to have a water station that also has hot water on the first floor of the Reg. Ex-libris as well as other cafes on campus closes on weekends and during interims /breaks, and there is no way to get hot water. This is very crucial during the winter times, when it is very cold. I think one solution would be to install the water hydration stations like the ones in the Maroon Market, Hutchinson Commons and Midway Market. Instead of buying bottled water, people can fill up their bottles with filtered water (hot or cold) for free there.
Thirdly, it would be convenient to have lockers installed in the Crerar library. Crerar is the only library that stays open late consistently on weekdays and weekends during the interims and breaks. But there are no lockers to keep personal belongings. It is impossible to carry laptops or personal items all the time, and this is one of the main reasons that keep students from going to Crerar. It would be nice to at least have coin lockers, so people can leave their belongings in for a short while without having to worry about theft.
It seems a well-kept secret, because we hardly ever see anyone using it, but there is a hydration station on the first floor of the Reg. Admittedly, it only dispenses cold water.
However, when Ex Libris is open, we've noticed the cafe staff will often fill up your cup with hot water (note "yours" -- don't ask for a free cup) if you ask nicely.
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We get occasional requests for lockers in Crerar (see this post), and while it might seem a fairly trivial exercise to move some of the lockers in Regenstein across Ellis Avenue, there's actually staff costs involved in maintaining locker operations. We've achieved some economies of scale at the Reg -- locker rental being one of many services offered by our multi-talented IPO staff -- but it's not something we can replicate at Crerar without significant time from our circ staff.
We're also a little worried about uncharged Library material being "cached" in lockers -- in the past, we've had problems with patrons hoarding materials at both Regenstein and Crerar. (The old-timers in the Suggestions Office remember regularly discovering O-Chem textbooks squirreled away on the 2nd floor.)