I'm here for the week for work, and extremely bored in the evenings.

The bartender at Applebee's recommend Time Out bar or something. Anything else to do in town in the evenings?

Time Out is good as well as Legends at the bottom of the hill before you get to far into town on highway 30.    You could check out a Lumberkings game if they're in town.  They are down on the river dike.  There's a somewhat new gunshop up on the north end called Sureshot Gun shop.  There's a movie theater behind the Walmart that's fairly reasonable.  Clinton doesn't have too much exciting going on for them anymore it seems.

I experienced similar boredom during my week stay there.

About 10 years ago I spent a week in Clinton while putting in some flooring at the HyVee. Maybe it was just my timing, but it is the only time I have ever visited a place and watched someone get arrested every day that I was there.  My travels didn't even deviate much past the straight line between the Super 8 where I stayed and the store where I was working.

One night we had pizza at a place somewhere between the hotel and the store, but most time between work shifts was spent playing cards in the room or reading.

Not much to do in town except eat and go to Wally world. The two gunshops aren't really even worth driving out of the way for, imo.