Just to tidy this one off then,
1. What do Football, Woolworth, Heinz and Dr Pepper have in common? They are Stud poker games
2. What do Karl Marx, Michael Faraday, Herbert Spencer and George Eliot have in common? All buried at Highgate Cemetery (Bilbo1967)
3. What do Romney Marsh, Suffolk, Clun, Forest and Swaledale have in common? Breeds of sheep (Shayne Parkinson)
4. What do tulip, balloon, and flute have in common? Types of Wine Glass (Bilbo1967)
5. What did the poets Wordsworth, Tennyson, John Masefield and John Betjeman have in common? Poets Laureate (Hamlet53)
6. What do nitrous oxide, sodium pentothal and cyclo propane have in common? General Anaesthetics (Hamlet53)
7. What do Micmac, Cree and Ojibwa have in common? North American tribes (Hamlet53)
8. What do Coburg, Vienna, Cottage and Bloomer have in common? Types of loaf (Bilbo1967)
9. Clout, Lost Head, Box and French are all types of what? They are Nails (SneakySnake)
10. What do Glastonbury, Caquetoire and an Elizabeth X have in common? All types of Chair
So the scores were:
Bilbo1967 - 3
Hamlet53 - 3
Shayne Parkinson - 1
SneakySnake - 1
Me - 2 (

)
A tie between Bilbo and Hamlet!