I know that manners are dead, but I get more frustrated daily at the gym. Gyms have limited numbers of weights, benches racks and machines and it is just good manners to use a given machine as quickly as reasonable and move on. People on phones have no apparent regard for others. They do a set on the apparatus, and delve into their phones for prolonged times, far longer than needed as a break between sets, with no regard that other people may be waiting to use that bench or machine. It seems to get worse every day and selfish behavior seems to be the rule.