My suggestion would be to use intermediary sites like Lounge Buddy and get everyone into one lounge.... The cost isn't that much and would be easier to deal with than trying to figure out how to get everyone into a lounge and how to collect everyone when the time comes. If you REALLY want to, you can always split the cost of what.... $52? by the five of you? $10 to get into a lounge is a steal if it's a decent lounge. You can also check your collective credit cards as some of them may have a free entry...