Given that Club is only £100 more than Economy from LGW (£200 v £100ish) then you may want to all splash out. £50 / leg for lounge access, better food, booze, 40 TP's and far more miles is not a bad deal at all.

If you're not all travelling to LGW together, you have an extra excuse to sneak into the lounge without your friends! Its a bit meaner to abandon them in BCN when you will all arrive at the airport together!

Slightly OT, but I was looking at Rome prices for Valentines weekend next year and the Club prices from LGW (£300 return) are actually lower than the Economy fares at certain times!