While sitting at the Oxygen Party Bar, one may not notice any difference. However as one leaves the oxygen party bar they will notice they have more energy and less aches and pains than before the oxygen treatment. If they had lactic acid buildup in the muscles, it will be greatly reduced and ones stamina will be noticeably increased. One will be able to dance and party harder.
If one is drinking, they will have less of a tendency for a hangover the next day. Their blood alcohol level will probably not change much but they can expect an increased tolerance to alcohol and will be less likely to be clumsy and awkward.