Recommendations for areas to visit in Thessaloniki, Greece

I've studied the places to visit in Thessaloniki, but when traveling
with others who are picky, don't want to walk or spend much, what do
you suggest that would be most interesting?

We're not interested in:

o Nightlife
o Bars
o Dancing
o Expensive sites

Historical places are fine, as long as they don't require alot of
exposure to the outdoors in the heat. Clean, attractive restaurants
with non-smoking areas are also great. Thanks for your suggestions.

BJ
http://journals.aol.com/sisgail/MyLifesJourney
http://www.powertochange.com