Cocktail Bar Igihe Gamsei yafungurwaga mu 2013, hyper-localism yatangijwe mu myitozo yari ifite kugeza icyo gihe yari igarukira gusa ku biryo. I Gamsei, ibirungo bya cocktail biribwa cyane cyangwa bihingwa nabahinzi ba artesian. Imbere yimbere, ni ugukomeza neza iyi filozofiya. Kimwe na cocktail, Buero Wagner yaguze ibikoresho byose byaho, kandi akorana mubufatanye bwa hafi nababikora kugirango batange ibisubizo byabigenewe. Gamsei nigitekerezo cyahujwe rwose gihindura ibyabaye byo kunywa cocktail mubyabaye bishya.

Izina ry'umushinga : Gamsei, Izina ryabashushanya : BUERO WAGNER, Izina ry'abakiriya : Trink Tank.

Ibishushanyo mbonera ni ibyamamare bizwi cyane bituma Isi yacu iba nziza hamwe nibishusho byabo byiza. Menya abashushanya ibyamamare nibikorwa byabo bishya, ibihangano byumwimerere, ubwubatsi bwo guhanga, imiterere yimyambarire idasanzwe hamwe nuburyo bwo gushushanya. Ishimire kandi ushishoze ibikorwa byumwimerere byabashushanyo batsindiye ibihembo, abahanzi, abubatsi, abashya nibirango kwisi yose. Shishikarizwa n'ibishushanyo mbonera.