Flew back from MSY in CW a couple weeks ago. There's no lounge of any kind so BA gave $28 per pax to spend in the terminal (at food based establishments, newsagents wouldn't accept them for snacks and drinks). So that's what BA costs a lounge visit at there. Between 2 of us $56 paid for two excessively large smoothies, two bottles of water and 4 beers, with surplus coins plugging the shortfall. In a lounge we would have consumed more value than that. Granted prices are inflated in an airport, but the value of F&B in a lounge can also be measured against what it would cost to buy refreshments outside, even if the bulk procurement cost is much less. It's a bit like comparing a visit to a restaurant to a shopping trip to ASDA.