Not sure of the actual percentage but, from memory, over 60s get a 10% reduction in either 5 or 7 day membership.
Depends on where you are in terms of demographics, but here in gods waiting room the competition for the senior golfer is fierce! Over 60 % of the population in south Dorset are over 50 so targetting the mobile senior player is key as there are few places left with joining fees.
No specific provision at my new club. 5 day memberships are available but are in the minority.
Old club scrapped it (50% of full rate) but now the seniors have taken over there was talk of reinstating it.