Just a passing thought if you run it as 8 groups of 8 with 62 then 2 groups would have 7. The groups with 7 could potentially have a match against one of the people in the other bracket. So that one week each player in the bracket of 7 plays against one in the other bracket of 7. Thus artificially boosting the number of players in both brackets to 8 and creating a scheme where everyone plays the same number of games. The problem is that if these brackets are different geographic locations or skill levels but basically the thought is (Ill provide three brackets one with 8 and the two with 7)
Players in bracket 1: A, B, C, D, E, F, G, H
Players in bracket 2(7 man): I, J, K, L, M, N, O
Players in bracket 3(7 man): P, Q, R, S, T, U, V
Week 1
A vs B
C vs D
E vs F
G vs H
I vs J
K vs L
M vs N
P vs Q
R vs S
T vs U
V vs O
IT takes a 8 man bracket 7 weeks to play everyone, it takes a 7 man bracket 6 weeks to play everyone and 1 extra week to play one opponent from the other bracket. (EDIT: The vs other bracket has to take place over the 7 weeks each because there is an odd man out otherwise ie one a week cross bracket)