Those are absolutely priceless, especially the second one. The problem is that as most of us are generally kind we can get lumbered! I travel alone but make a point of never attaching myself to other guests at the hotel, as I feel they are on holiday with their other half or close friends and don't want 'extras' tagging along. If asked, I may join them for a drink or a trip into town but don't make a habit of it.