I go to school in Boulder (Go Buffs!), but since I don't live down there, I'm not by any means an expert on the town. But here are some ideas:

You said you are going in June, so the weather should be nice and warm -- as a result you can check out these places:

Things to Do:

- The Hill (shops, restaurants, etc on "The Hill" near CU)

- 29th Street Mall -- a shopping district, they have the Purple Martini there you can check out at night, its a lounge/bar type place

- Pearl Street Mall, again more shops, some boutique and some of your regular known stores -- they often have random performers, fire throwers, etc throughout the day/evening

- Boulder Creek - you can go tubing down the creek, popular summer activity in Boulder.

- Hiking-- there are lots of trails to hike around Boulder, you can hike the Flatiron mountains.

- CU/University of Colorado has different museums and like you mentioned, the Shakespeare festival going on


Places to eat at:

Just in general, some of these are chain restaurants, but I love em anyway

-Illegal Petes (fast food, like Qdoba)
-Chipotle (fast food, like Qdoba, but better)
-8 Island Hawaiian Grill (semi fast food)
-Boulder Tea House (expensive)
-Cheesecake Factory
-Redfish Brewhouse (seafood/steak)


As for hotel, there is the Millennium hotel in Boulder. Or you can try to find a place in Louisville/Superior which is about 10 mins from Boulder, or in Broomfield which is about 15 mins from Boulder.

And if you get real bored in the day/night... a drive to Downtown Denver isn't that far away!

Don't know if this helps, let me know if you need anything else...