Good coffee with a slice of homemade cake. Milkshakes for kids. Wine, beer and local cider for the adults. Very pleasant indeed. Sit outside in the al-fresco area, there is sometimes live music and you are in Guernsey's only public square watching the world go by. Worth a visit.
There are lots of pubs to be visited all over the island, in St Peter Port the pubs are easy to find and are mostly along the waterfront. Laska's has an enourmous list of cocktails and is a popular spot. Start here and work your way north along the waterfront, ending at the taxi rank.
Guernsey cream teas:The OGH hotel is an excellent location for wintertime cream teas. The Victoria Cafe in Candy gardens has excellent views but you mustn't be in a hurry!. Cobo tea room on the west coast has excellent home made cakes. Or sample a piece of coffee cake from the kiosk at Port Soif; No real indoor space there but a lovely sheltered garden to hang out in.