Misc: What group sang "Come On Eileen"??

Questions

on three's company,what was jack's retaurant that he opened and was head chef?

on three's company,what's the first name of mr. furley's (landlord) tight wad brother who owned the building?

on three's company,what city did the trio live in?

on three's company,what is the name "chrissy" short for?

on three's company,what was chrissy's father's ocupation?