Cooking: foodies or avid cooking community.
Fishing: fisherman/people who like to fish.
Shopping: retail shopoholics.
Playing Music: musicians, finding instruments/gigs.
Going to a show: opera, plays, broadway, symphonies.
Going to see a ball game: baseball fans/football fans.
Hiking: outdoors adventurers
Drinking: bar hopping, wine connoisseurs, coffee junkies.
Boating/canoeing/kayaking: aquatic community.
Walking a dog: pet lovers.
Running: athletic type.
Clothes shopping: fashion un-knowledgeable/or fashionistas
Fantasy Football: NFL community.
- its a start.