Not living close to an airport I often stay over the night before so try arrange meet ups the night before via this forum. Done this at both Manchester and Heathrow on a few occasions it certainly beats sitting in a airport hotel room yourself.
Doesn't always work as not everyone uses the forum but would say on three out of every four trips i end up meeting some of my holiday companions, had between 3 and 6 turn up.
Already know of one person staying at the same hotel on my next trip in April.
Heathrow usually arrange the meet at the Three Magpies on Bath Road for a meal, its near a few hotels (Park Inn, Renaisance, Holiday Inn, Radisson, Sheraton Skyline, etc) but also on the Free Bus route so even had people coming to join us that were staying at hotels near terminal 5.
Mick