Nope. It's quite hard to do 'flexitime' (of whatever description) in consulting as it doesn't give a great impression if you're all in the boozer at 3pm, although depending on the client culture it might be OK, and I'd say things are improving with remote working generally giving a bit more flexibility and lower expectations on 'presenteeism'.
We have "summer days" instead which is basically additional holiday that can only be used in summer months.
As a rule I think these type of policies are most effective in organisations where everyone is on the same schedule, i.e. if the whole company is off from 3pm on Friday that's kind of OK because it means nobody is trying to work and getting blocked due to colleagues being absent.
You have to be careful as it can foster resentment if most people are posting selfies from beer gardens meanwhile a few poor souls are left behind in meetings / customer facing / whatever. If you can rota it so people don't miss out in aggregate that's better, but often you find that certain roles are harder to cover than others.
More generally to Roff's point above I don't particularly like the 'unwritten rule' that some follow about Friday afternoons being a wind down where you mess about, long lunch break, leaving early etc. Again that really creates resentment when you are there slogging your guts out until 6pm or later, people apologising for putting in a meeting at 4pm on a Friday etc like they are embarrassed at asking you to work during your contracted working hours. That said, whilst I don't like it I do acknowledge it and would agree that productivity is probably reduced on Friday afternoons so schemes like this can be beneficial if it increases work done at other times with little drop in Friday output.
There's probably a few industries where it would actually be frowned upon if you WEREN'T in the pub on a Friday afternoon... recruitment, London Market insurance from a few years back etc.
