My experiences with the executive lounges in the US and UK are not very good. Most are forgetable and not worth a visit. Frankly, I wish they would just stop the whole lounge business if they are not able to provide a decent product.
Would be much better to just provide diamonds a free b-fast in the restaurant and maybe half-off on appitizers in the bar in the evening.
Good lounge products can be provided if the property really wants to do it. An example being the Hilton Sao Paulo. Very very good.