Weekday afternoons downtown

I work near the Tellepsen YMCA, go to work on time, leave on time, and have not seen much of downtown. I plan to take some hours off now and then to see downtown. I don't drink alone and not interested in bars or nightlife. I wouldn't mind looking into food/coffee spots but not interested in sit-down restuarants (unless there is some historic value). I went to Phoenicia cafe/market and Allen Center food court and ate there, which was nice. Any other spots? If I visit the tunnel, what are good starting points?