Pelz served at least two terms as LASFS President and was Treasurer for nearly a decade, shepherding the club to ownership of its own building, an idea originally proposed by Paul Turner. Even after he retired from that position, he remained active on the corporate Board of Directors, serving as Chairman and later as corporate treasurer. He was a respected elder statesman of the club until his death in 2002. Pelz came into fandom before the hobby had speciated, when fans commonly participated in many areas of the hobby. Pelz published general interest fanzines and newszines, assisting Ron Ellik with Starspinkle, then starting his own Ratatosk. Pelz also became an omniapan, joining all fannish amateur press associations then in existence — FAPA, SAPS, OMPA, and The Cult, and later two local APAs: APA-F and APA-L. Even when a special "fractional" issue of APA-L was produced at a LASFS social event without telling him, Pelz arrived with a fanzine to contribute, keeping his unbroken string. The only longer unbroken run of participation in APA-L is that of Fred Patten, who contributed every week until January 22, 2009, for 2280 issues. Pelz spent a lifetime assembling one of the greatest privately held fanzine collections, which now is part of the J. Lloyd Eaton Collection at the University of California, Riverside.
Costume
Pelz also took part in costume competitions and won several prizes at world and regional conventions, including
Pelz was also active in filkmusic in the 1960s and early 1970s. He wrote several classic filksongs, including musical settings for 3 poems from Silverlock by John Myers Myers, and published The Filksong Manual, originally in four slim volumes, later re-issued as a single volume with added material. In later life, Pelz was best known for his activities in organizing science fiction conventions, sometimes referred to as SMOFFing. He was heavily involved with nearly every convention held in Los Angeles from the mid-60s until his death. Pelz was instrumental in convincing the LASFS to start holding an annual convention, Loscon, and he chaired Loscon X. He co-chaired the 30th World Science Fiction Convention in 1972, with Chuck Crayne. He co-chaired the 1969 Westercon, and served as chair of the 1976 and the 2002 Westercon. He was Fan Guest of Honor of the 38th World Science Fiction Convention in Boston in 1980. Pelz also lent his time and expertise to conventions held in other cities, even outside of North America. His leadership was instrumental in rescuing the ill-fated 1966 Westercon, Westercon XIX, in San Diego. For many years he drove a car with the license plate "SMOF 2". Pelz also found time for other projects, including the Fantasy Showcase Tarot. He arranged for 78 artists to paint one Tarot card each, and arranged for the deck to be published. It is still available for sale. The project grew to include four non-standard cards, and several of the original artists had to be replaced because the promised paintings were never delivered, so the list of artists eventually grew to nearly 100.