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In addition to Stationers which, as noted, can be quite expensive as they are very similar to a one day member guest including lunch and dinner and prizes, I have played in Philly GAP Member Play Days at many of the top clubs in the area. Also, through my volunteer work for GAP, I have played in the annual Volunteer Day event over the years at local clubs.
When in AZ, the Southwest PGA Pass has some events at local private clubs as does the AZ Golf Ass'n.