Alexandroff Ragtime Band (ARB) was initiated in the summer of 1986 by Roumen “Fats” Alexandroff, banjo.Their first performance was in April 1987 within the program of the National “Youth Jazz Stage”, carried from Sofia to Plovdiv. (ARB unites a circle of Sofia musicians with thorough interests in the traditional jazz – Ragtime, Blues, Dixieland.) It was founded as a trio, thus: clarinet, banjo and tuba, but has been working as an open accepting system, which for the variable engagements was welcoming other musicians - piano, trumpet, trombone, saxophone. The only rule with no exceptions was the absence of percussion instruments.

From 1987 to 1990 ARB, together with the jazz reviewer Vladimir Gadjev, was being the host of the weekly “Saturday Jazz Club” in Sofia. As a final performance of every season, in June, in the spacious park of the youth center, the national “Jazz In The Garden” festival was regularly carried out – the first in Bulgaria in the open. According to available possibilities guest musicians from Europe and the U.S.A. also perform: George Adams (ts, fl), Tamaz Kurashvili (b), “Tuti Heat”(dr), Nedra Wilar (b), Karen Brigs (v), Milcho Leviev (p) and others.

From 1987 with ARB continuously performs the singer Svetla Gosteva, who is at this moment on the pay-roll solo in the Plovdiv band “White, Green, Red”. Till 1971 Svetla Gosteva is a well-known and favorite name in Chech republic, being a performer with a significant success in the international festivals in Psherov, Karlovi Vari and Prague. She has sung with the best traditional jazz orchestras , such as “Storyville Jazz Band”, and with the Prague “Steamboat Stompers” she has recorded a LP album: “Supraphon Nr. 0151100”.

In 2007 within ARB perform:
Georgi Tsenev (p, cl & voc) and Nevilian Gemijev (cl, voc), Roumen “Fats” Alexandroff, (bj, voc, lead), Nickolai Temniskov (tuba) and Dimitar Uzunov (tuba). From 2005 ARB was joined by the singer Аngelina Sekulova.

In different times and for different performances with ARB has been playing: Svetozar Rusinov (cl, sax), Julian Ianushev (sax), Venko Zahariev (sax), Hristo Zlatinov (sax), Hristo Hristov (cl, sax), Georgi Georgiev (tp), Stoiko Radnev (tp), Gencho Vartovski (tp), Georgi Kornazov (tb), Vladimir Slavchev (tb), Nickola Marchev (tuba), Vassil Akimov (tuba) and others.