One not looking for an expensive night on the town

• One who doesn't need fancy wining and dining
• Walk in the park and hot dogs, perhaps
• Takeout food together with a Netflix movie, maybe
• Easy-to-please companion

Wiktionary Word definitions in Wiktionary
n. (context always italicized English) A certain mutant strain of fruit fly (''Drosophila melanogaster'') with heightened sensitivity to ethyl alcohol (ethanol), causing it to lose postural control at lower concentrations of the drug.