United Premier members, not sure if limited to Premier1K’sonly, now have an additional benefit of Business Lounge access at more than 1200 Regus locations worldwide. The fee of joining to Regus Businessworld Gold is waived for United Premier members. I received an email from United yesterday about this.
You can try singing up here and see if they accept your Mileage Plus number. I have previously been a member of Regus through an offer that they had extended to Delta’s SkyClub members.
You never know when an access to an office space where one can quickly do emails or have an access to a meeting place can come handy.
Regus has often been extending the base level Businessworld Gold access to tier members of number of airlines. You can utilize their business lounges and refreshments free of charge, but obviously charges apply if you need additional help like a conference room.