Actually, his father’s store is an example of a *location *that is highly seasonal as much as it is a business that is highly seasonal. Resort/vacation/second home areas often have a lot more people “in season” and therefore the busy seasons may not line up with those in non-resort areas.Even a general retailer might have its busy season in the summer if the summer population is many times that of the year round population. For example , Fire Island has a year round population of about 500. Two popular areas ( Fire Island Pines and Cherry Grove ) have a combined year round population under 40 and a combined summer population of over 4500.
Fast food restaurants don't really have busy seasons, but I was once sent to a resort area out-of-season for a work conference ( Lake George , maybe). I saw an A&W restaurant , which no longer exist in the NYC area. I was looking forward to getting lunch there, but it was only open weekends between Labor Day and Memorial Day. Apparently there wan't enough business to be worth staying open the rest of the week.