Drive over to Old Pasadena, a few blocks away. Park at one of the several inexpensive parking structures-- our "usual" is on Fair Oaks, between Green and Colorado. Mosey around until you find something you like. Old Pasadena has a variety of restaurants; many are pretty good but I can't think of anyplace stupendous. It is a fun area to walk around, lively and attractive.
Good Thai, at Saladang (Fair Oaks, south of Old Pasadena). Has its own ample parking lot.
Good Mexican in a pretty setting, very nice patio too: El Portal, on Green, just a few blocks east from your hotel but I'd drive frankly. Has it own parking lot.
These are some of the easiest suggestions, for a relaxing and unambitious evening.