You still need to be quite rich to be a member in one of these clubs.
From what i remember, i think either Seagrave or P1 you need to put an initial membership deposit in the range of 35-40K pounds just to join, then the fees for rental are quite expensive. These clubs are not priced to make these supercars easily or affordably accesible for ordinary ppl with regular jobs. With good reason, i cannot imagine the maintenance and insurance costs involved with maintaining super expensive cars that are often tempermental to begin with. If i ran such a business, i would want to make membership pretty restrictive and exclusive as well. Otherwise youre investing a lot of $$ and just end up losing it indiscriminately renting these cars out to whomever walks off the street.