I did a cream ale this spring and added about a cup of rubarb jam to the second ferment. This worked real well- I plan on making this again. If you put more jam in, that would pump up the abv. At bottling I added a saison yeast and had brut like carbonation.
I had a bottle of Modello lager that must have gotten a little to much light. It had just a touch of the smell and taste-still drinkable. I have some fresh picked hops and usually add a few cones to a glass of ale or lager. I did this to the Modello and it seemed to take that skunky smell away...