I can't think of anything that would be considered weird. I don't think they drank anything that isn't also consumed by younger generations today. Loads of tea and instant coffee at home. Soft drink occasionally, mainly bought alongside takeaway but also consumed as a cool alternative to the tea/coffee in the summer months. Soft drink flavours consumed were typically Coke (more so when I was younger), Solo, Ginger Beer or a medley of various generic-branded fruit flavours. The one thing that was kinda different was my mum would buy this old-timey coffee and chicory syrup which she would sometimes make iced coffee with.

My mother wasn't a big drinker, but every year around Christmas-time (which is summer here) she'd buy a box of this peach flavoured wine and a bottle of Bailey's, and she'd enjoy a glass of either one on special occasions or on the occasional balmy evening to unwind. The box of wine in particular would last from Christmas all the way to her birthday in late February.

My father who isn't a boomer (born in 27) drank a bottle of rum every day for most of his adult life. They separated when I was small, but from what I saw of him he was very health conscious otherwise. Limited his coffee intake and drank plain water, which was what he also chose to dilute his rum with instead of some sugary carbonated drink as most do.